When 23.6 g of calcium chloride, CaCl₂ (110.98 g/mol), was dissolved in water in a constant-pressure calorimeter, the temperature rose from 25.0 °C to 38.7 °C. If the heat capacity of the solution and the calorimeter is 1258 J/°C, what is the enthalpy change when 0.710 mol of calcium chloride dissolves in water? The solution process is
CaCl₂ (s) → Ca²⁺ (aq) + 2Cl⁻ (aq)
Answers
The amount of heat needed to raise a substance's temperature by one degree is known as its heat capacity. The enthalpy change when 0.710 mol of calcium chloride dissolves in water is 81295.28 J / mol.
The amount of heat energy needed to increase the temperature of a given quantity of matter by one degree Celsius is referred to as heat capacity. Heat capacity is a broad attribute that depends on the size or quantity of a specific substance.
Joules per Kelvin or joules per degree Celsius are the units used to measure heat capacity.
Mathematically,
q = CΔT
q = 1258 J/°C (38.7 - 25.0) = 17234.6 J
n of CaCl₂ = 23.6 / 110.98 = 0.212 moles
The enthalpy change when 0.212 mol of calcium chloride dissolves in water by using the equation:
ΔH = q / n = 17234.6 / 0.212 = 81295.28 J / mol
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Related Questions
The following reaction is part of the electron transport chain. Complete the reaction and identify which species is reduced. The abbreviation Q represents coenzyme Q. Use the appropriate abbreviation for the product.
FADH2 + Q →
The reactant that is reduced is: _____
Answers
Answer:
\(FADH_2 + Q --> FAD + QH_2\)
The reactant that is reduced is \(FADH_2\)
Explanation:
The complete equation is as below:
\(FADH_2 + Q --> FAD + QH_2\)
Recall that oxidation involves the gain of electrons while reduction involves the loss of electrons.
In the above reaction, \(FADH_2\) loses electrons to coenzyme Q and becomes reduced to FAD, hence the oxidizing agent. Coenzyme Q gains electrons and becomes oxidized to \(QH_2\) , hence the reducing agent.
In order words, \(FADH_2\) is reduced while coenzyme Q is oxidized.
Find the difference between the numbers. (2.260×104)−(8.098×103)
Answers
The difference between the numbers,
(2.260×104)−(8.098×103) = 598.539.
What is subtraction?Subtraction is a mathematic operation. Which is used to remove terms or objects in an expression.
Given:
Two numbers,
(2.260×104) and (8.098×103).
First, we simplify the numbers,
(2.260×104) = 235.04
And (8.098×103) = 833.579.
The difference between the numbers,
(2.260×104)−(8.098×103) = 833.579 - 235.04.
(2.260×104)−(8.098×103) = 598.539
Therefore, then value is 598.539.
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budding in yeast is it physics chemistry or biology ?
Answers
Answer:
Budding in yeast is primarily a biological process
Find the pH of a 0.350 M aqueous benzoic acid solution. For benzoic add. Ka = 6.5 x 10^-5.
a) 4.64
b) 4.19
c) 2.32
d) 11.68
Answers
Answer:
correct option is (a)
The solution would be using this: C6H5COOH = H+ + C6H5COO Ka = 6.5 x 10^-5 = (H+)(C6H5COO-) over
(C6H5COOH)
Let X = moles per liter (H+) and also = moles per liter (C6H5COO-)
Ka = 6.5 x 10^-5 = (X)(X) over .350 molar = acid solution 6.5 x 10^-5 = X^2 over .350
X^2 = 6.5 x 10^-5 times .350 which = 2.275 x 10^-5
x = V2.275 x 10^-5
X = 1.5083 x 10^-5 moles per liter H+
pH = -log(H+) = -log 1.5083 x 10^-5 which
= 4.6215
The pH of a 0.350 M aqueous benzoic acid solution is 4.64. The correct option is a).
What is pH?In chemistry, the pH scale is used to define the acidity or basicity of an aqueous solution. Historically, pH stood for "potential of hydrogen."
The solution would be using this: C₆H₅COOH = H+ + C₆H₅COO Ka = 6.5 x 10⁻⁵ = (H+)(C₆H₅COO-) over
(C₆H₅COOH)
Let X = moles per liter (H+) and also = moles per liter (C6H5COO-)
Ka = 6.5 x 10⁻⁵ = (X)(X) over .350 molar = acid solution 6.5 x 10⁻⁵= X² over .350
X² = 6.5 x 10⁻⁵ times .350 which = 2.275 x 10⁻⁵
x = V2.275 x 10⁻⁵
X = 1.5083 x 10⁻⁵ moles per liter H+
pH = -log(H+) = -log 1.5083 x 10⁻⁵ = 4.6215
Therefore, the pH is 4.6215. The correct option is a). round to 4.64.
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HELP ME OUT PLEASE!!
Barium sulfate, BaSO4 is a white crystalline solid that is insoluble in water. It is used by doctors to diagnose problems with the digestive system,
Barium hydroxide, Ba(OH)2 is also a white crystalline solid and is used in wastewater treatment.
How many more oxygen atoms are represented in the formula for barium sulfate than in the formula for barium hydroxide?
A) 2
B) 4
C) 1
D) 8
Answers
Answer: 2
Explanation:
Ba(OH)2 contains two oxygen atoms
BaSO4 contains four oxygen atoms.
This means that barium sulfate contains two more oxygen atoms than barium hydroxide in its formula.
Hope this helps!! :)
According to formula BaSO₄, Barium sulfate contains 2 more oxygen atom.
The correct option is (A) 2
Barium sulfate's distinguishing featureBa(OH)₂ has two oxygen atoms in it.
Four oxygen atoms may be found in BaSO₄.
This indicates that the formula of barium sulfate has two extra oxygen atoms than the formula of barium hydroxide.
Barium sulfate, often known as BaSO4, is a transparent white pigment that has a long history. It is produced by combining sulfuric acid with barium hydroxide and other sources of barium.
Chemically speaking, barium hydroxide has the formula Ba(OH)2. The monohydrate of barium, sometimes referred to as baryta or baryta-water, is one of the element's main compounds. The typical commercial form of monohydrate is this white granular substance.
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Help!!!
Question: What is the correct order of the particles that give texture to soil from smallest to largest?
Options:
A: Clay, sand, silt
B: silt, sand, clay
C: clay, silt, sand
D: sand, silt, clay
Answers
The correct order of the particles that give texture to the soil from smallest to largest is clay, silt, and sand; option C.
What is soil texture?Soil texture refers to a physical classification of the component and types of soils based on their physical texture either as coarse or fine particles.
There are several types of soils and these various types of soils have different textures.
The types of soils and their arrangement based on increasing particle size are as follows:
clay soil - this is the finest particle soil typesilt - this is the next soil type in terms of texturesandy soil - this is the largest of the three soil types in terms of size and texture.Learn more about soil texture at: https://brainly.com/question/8513717
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What fraction of a 100 g sample of K - 42 will remain after 24.8 hours?
Answers
Answer:
1/4
Explanation:
From the question given above, the following data were:
Original amount (N₀) = 100 g
Time (t) = 24.8 h
Fraction remaining =?
NOTE: The half-life of K–42 is 12.4 h
Next, we shall determine the number of half-lives that has elapse. This can be obtained as follow:
Time (t) = 24.8 h
Half-life (t½) = 12.4 h
Number of half-lives (n) =?
n = t / t½
n = 24.8 / 12.4
n = 2
Finally, we shall determine the fraction remaining. This can be obtained as follow:
Number of half-lives (n) = 2
Fraction remaining =?
Fraction remaining = 1/2ⁿ
Fraction remaining = 1/2²
Fraction remaining = 1/4
[Cr{P(CH2CH3)3}6]2(SO4)3
Answers
8.0g of certain gas occupies 5.6 L at STP.
A) How many moles of gas are present?
B) What is the molar mass of the gas?
C) What is the common atmospheric gas was collected?
Answers
Answer:
A) Using the ideal gas law, we can calculate the number of moles of gas present:
```
PV = nRT
```
where:
* P = pressure (atm) = 1 atm
* V = volume (L) = 5.6 L
* n = number of moles of gas
* R = ideal gas constant = 0.08206 L atm / mol K
* T = temperature (K) = 273.15 K
Solving for n, we get:
```
n = (P * V) / RT
```
```
n = (1 atm * 5.6 L) / (0.08206 L atm / mol K * 273.15 K)
```
```
n = 0.25 mol
```
Therefore, there are 0.25 moles of gas present.
B) The molar mass of the gas can be calculated by dividing the mass of the gas (8.0 g) by the number of moles of gas (0.25 mol):
```
Molar mass = Mass / n
```
```
Molar mass = 8.0 g / 0.25 mol
```
```
Molar mass = 32 g/mol
```
The molar mass of the gas is 32 g/mol.
C) The common atmospheric gas with a molar mass of 32 g/mol is oxygen (O2). Therefore, the gas that was collected is oxygen.
Explanation:
hydrogen reacts with 32g of oxygen to produce 34g of hydrogen peroxide . how many grams of reactants were reacted
Answers
Answer: 32g of oxygen and 4g of hydrogen were reacted in total.
Explanation:
To find out how many grams of reactants were reacted, we need to use the balanced equation of the reaction. The equation for the reaction between hydrogen and oxygen to produce hydrogen peroxide is:
2H2 + O2 --> 2H2O2
From the equation, we know that the reaction involves 2 moles of hydrogen and 1 mole of oxygen. We can use the balanced equation to determine the stoichiometry of the reaction, which tells us the relative number of moles of each reactant and product.
We know that 32g of oxygen was reacted, and since 1 mole of oxygen is equal to 16g, we can calculate the number of moles of oxygen by:
32g / 16g = 2 moles
We know that 2 moles of hydrogen are required for every mole of oxygen. so the number of moles of hydrogen is also 2 moles.
We know that 1 mole of hydrogen is equal to 2g, so we can calculate the number of grams of hydrogen by:
2 moles x 2g = 4g
Therefore, 32g of oxygen and 4g of hydrogen were reacted in total.
What type of bonding around a central atom would result in a trigonal planar
molecule?
A. Three groups bound to it with no lone pairs
B. One group bound to it with two lone pairs
C. Three groups bound to it with one lone pair
D. Four groups bound to it with no lone pairs
Answers
Explanation:
A. 3 groups bound to it with no lone pairs
A vegetable soup recipe requires one teaspoonful of salt. A chef accidentally puts in one tablespoonful. Now the soup is much too salty.
a) What can the chef do to reduce the salty taste of the soup?
b) What effects would your suggestion in a) have on the soup?
Answers
Answer:
a. Put a piece of fresh sliced yam with a bore into it into the soup.
Explanation:
b. Osmosis may occur
The chef can put a slice of yam in the soup with a hole in it as it will absorb excess of salt by process of diffusion.
What is diffusion?
Diffusion is defined as the process of movement of molecules which takes place under concentration gradient. It helps in movement of substances in and out from the cell.The molecules move from lower concentration region to a higher concentration region till the concentration becomes equal.
There are 2 main types of diffusion:
1) simple diffusion-process in which substances move through a semi-permeable membrane without the aid of transport proteins.
2) facilitated diffusion- It is a passive movement of molecules across cell membrane from higher concentration region to lower concentration.
There are 2 types of facilitated diffusion one is osmosis and dialysis.
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moles of each product that would form as a result of the decomposition of aspirin
Answers
The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).
The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:
\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)
From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.
Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.
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2) Make Flash cards elaborating following terms with example: i. Mole ii. Compounds iii. Molecular Mass iv. Types of Mixture v. Free Radical vi. Gram formula mass
Answers
(i) A mole is the amount of a substance containing 6.022 × 10²³ particles.
(ii) Compounds are formed by the chemical bonding of different elements.
(iii) Molecular mass is the sum of atomic masses in a molecule.
(iv) There are two types of mix homogeneous and heterogeneous mixtures.
(v) Free radicals are highly reactive species with unpaired electrons.
(vi) Gram formula mass is the sum of atomic masses expressed in grams per mole.
(i) Mole: A mole is defined as the quantity of a substance that has an equal number of particles that are in 12 grams of carbon-12.
It is denoted by mol and is used in chemistry to measure quantities of atoms or molecules.
Example:1 mol of oxygen gas contains 6.022 × 10²³ oxygen molecules.
(ii) Compounds: Compounds are substances made up of two or more different elements that are chemically bonded together.
They can be broken down into simpler substances through chemical reactions.
Example:Water (H2O) is a compound made up of two hydrogen atoms and one oxygen atom that are chemically bonded together.
(iii) Molecular Mass: The molecular mass of a compound is the sum of the atomic masses of all the atoms in the molecule.
It is expressed in atomic mass units (amu) or grams per mole.
Example:The molecular mass of water (H2O) is 18.015 amu.
(iv) Types of Mixture: A mixture is a combination of two or more substances that are not chemically combined.
There are two types of mixtures - homogeneous and heterogeneous.
Example:A homogeneous mixture is a solution, such as saltwater, where the solute (salt) is evenly distributed in the solvent (water).
A heterogeneous mixture is a mixture that is not evenly distributed, such as oil and water.
(v) Free Radical: A free radical is an atom or molecule that has an unpaired electron in its outer shell and is highly reactive. They can be both harmful and helpful to the human body.
Example:A common free radical is the hydroxyl radical (OH·) that is formed by the body during metabolism.
(vi) Gram formula mass: The gram formula mass is the sum of the atomic masses of all the atoms in a compound.
It is expressed in grams per mole and is used to determine the mass of a certain number of molecules or atoms.
Example:The gram formula mass of water (H2O) is 18.015 g/mol.
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pH of a buffer solution prepared from 0.155 mol of phosphoric acid, 0.250 mole of KH2PO4, and enough water to make 0.500 L of solution.
Answers
The pH of the buffer solution would be 7.11.
pH calculationPhosphoric acid, H3PO4, can donate three protons (H+) in a stepwise manner to form dihydrogen phosphate (H2PO4-) and mono hydrogen phosphate (HPO4^2-) ions. The chemical equation for the reaction is as follows:
H3PO4 + H2O ⇌ H2PO4^- + H3O^+
H2PO4^- + H2O ⇌ HPO4^2- + H3O^+
HPO4^2- + H2O ⇌ PO4^3- + H3O^+
The pKa values for these reactions are 2.15, 7.20, and 12.35, respectively.
To prepare a buffer solution, we need to mix a weak acid and its conjugate base or a weak base and its conjugate acid. In this case, we have a mixture of H3PO4 and KH2PO4, which is a weak acid and its conjugate base, respectively.
The Henderson-Hasselbalch equation for a buffer solution is:
pH = pKa + log([base]/[acid])
where [base] and [acid] are the molar concentrations of the conjugate base and weak acid, respectively.
Using the given values:
[acid] = 0.155 mol / 0.500 L = 0.310 M (molarity of H3PO4)
[base] = 0.250 mol / 0.500 L = 0.500 M (molarity of KH2PO4)
We can calculate the pKa value for the first dissociation of H3PO4 using the given Ka value:
Ka = 10^(-pKa) = 7.52 x 10^(-3)
pKa = -log(Ka) = 2.12
Now, substitute the values into the Henderson-Hasselbalch equation:
pH = 2.12 + log(0.500/0.310)
pH = 7.11
Therefore, the pH of the buffer solution is approximately 7.11.
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A gas sample weighing 3.78 grams occupies a volume of 2280 mL at STP. What is the apparent molecular mass of the sample?
(Note: R = 8.314 kPa.dm3/K.mol or 0.0821 L.atm/K.mol or 62.4 L.torr/K.mol)
Answers
PV = nRT
where:
P is the pressure of the gas (at STP, P = 1 atm)
V is the volume of the gas (2280 mL = 2.280 L)
n is the number of moles of gas
R is the ideal gas constant (0.0821 L.atm/K.mol)
T is the temperature of the gas (at STP, T = 273.15 K)
We can rearrange the ideal gas law to solve for n:
n = PV/RT
Let's plug in the given values and solve for n:
n = (1 atm) * (2.280 L) / (0.0821 L.atm/K.mol * 273.15 K)
n = 0.1002 mol
Now we can calculate the apparent molecular mass of the gas sample using the formula:
molecular mass = mass / moles
Let's plug in the given values and solve for the molecular mass:
molecular mass = 3.78 g / 0.1002 mol
molecular mass = 37.7 g/mol
Therefore, the apparent molecular mass of the gas sample is approximately 37.7 g/mol.
How many hydrogen atoms are there in 1.15 g of methane (CH4)?
Answers
4 hydrogen atoms
What amount of a 75 % m/v solution will be made if 50 g of solute are dissolved? Thank you po in advance.
Answers
The mass by volume percentage is an important method which is used to calculate the concentration of a solution. This type of concentration is usually expressed as a percentage. Here the amount of solute is
The mass by volume percentage of a solution is defined as the ratio of the mass of solute that is present in a solution relative to the volume of the solution as a whole.
The equation used to calculate the mass by volume percentage is:
m / v = Mass of solute / Volume (mL) of solution × 100 %
m / v = 50 g / 75 mL + 25 mL = 0.5 × 100 % = 50%
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The pressure inside the cabin of an airplane decreases to 12.5 psi during a high altitude flight. Convert this pressure value to units of …. (1 psi= 0.068 atm: This is another common pressure)
a. ... millimeters of mercury (mm Hg):
b. Submit
c. ... atmospheres (atm):
d. Submit
e. ... kilopascals (kPa):
The new helium gas cylinders have just arrived at the loading dock of a local party store. In the cool January air, the 20.0-L cylinders have a pressure of 55.7 atm. Once brought into the store, the cylinder’s temperatures increases to 31.9°C and the pressure adjusts to 61.3 atm. What is the outdoor temperature in °C? (Assume a constant volume.)
A sample of oxygen gas at 68.5°C and 3.88 atm is heated until its pressure has increased to 6.10 atm. What is the new temperature (in °C)?
Will B. Sellabraten purchases a set of Helium balloons at the local card shop. Each balloon occupies a volume of 15.8 liters when in the store; but when taken outside, they are observed to shrink. If the indoor temperature is 26.6°C and the outside air temperature is -2.4°C, then what is the new volume of the balloons when taken outside?
A sample of helium gas at 61.8°C has a volume of 342 mL. What is the volume of this gas at -71.7°C?
Answers
Which of these are enantiomers? There should be two.
Answers
Identify and describe the three ways that mutations affect organisms?
Answers
Answer:
The ways that mutation can affect an organism include:
Changing the physical characteristics of the organism.
It can impact the way that the DNA is able to code the genetic information.
Also, mutation can lead to the death of an organism.
What is mutation?
Mutation simply means a change in the DNA sequence of an organism. It can result from DNA copying mistakes that were made during the cell division.
Mutation can affect an organism as it changes the phenotype of the organism. It can also impact the way that the DNA is able to code the genetic information and lead to the death of an organism.
In the laboratory you dissolve 19.4 g of sodium chloride in a volumetric flask
and add water to a total volume of 375 mL.
What is the molarity of the solution? In M. What is the concentration of the sodium cation? In M. What is the concentration of the chloride anion? In M.
Answers
Answer: 0.885 M
Explanation: 19.4 grams of NaCl is (19.4g/58.55 g/mole) = 0.332 moles of NaCl. 375ml is 0.375 liters. Molar is moles per liter: (0.332 moles NaCl/0.375 liters) = 0.885 M
true or false
1. resistance provides friction to electron movement
2.high resistance will speed up electron movement
3.a circuit is an open path for electrons to move through
4. in a circuit, electrons move from the low voltage area to the higher
5. in a circuit, the light bulb is called the load
Answers
Answer:1
Explanation: friction is showing us how in the past
a. Identify the structures shown in the diagram. b. Identify the information that is contained within these structures. c. Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person. d. Explain why the structures are in pairs.
Answers
The answer responses to the structures shown in the diagram are:
A. chromosomes
C. They would be the same.
B. They are in pairs because each one comes from a different parent.
What is the structure about?The chromosomes are in pairs because humans have a diploid number of chromosomes, meaning they have two sets of chromosomes, one inherited from each parent.
The nucleus is important in eukaryotic cells and has many important parts that help the cell work properly. There are some parts inside cells called the nuclear membrane, nucleoplasm, nucleolus, and chromatin. Chromatin is made up of DNA and other proteins.
Every part of a person's body has the same genes, but the way they are organized can be different in different types of cells. The chromosomes in our skin cells might not be the same as the chromosomes in our muscle cells, even if they come from the same person.
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Identify the structures shown.
A. chromosomes
B. mitochondria
C. nuclei
D. vacuoles
C
Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.
A. There would be longer.
B. They would be shorter.
C. They would be the same.
D. They would be different.
Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.
A. There would be longer.
B. They would be shorter.
C. They would be the same.
D. They would be different.
Explain why the structures are in pairs.
A. They aren't in pairs.
B. They are in pairs because each one comes from a different parent.
C. This cell is making a copy of itself.
D. The cell always has 2 copies in case 1 is damaged.
The beginning of this chemical equation represents the
starting materials for a chemical reaction,
H2O + S03 - ?
Which compound is likely produced by the chemical reaction?
A. HF
B. H2CO3
C. H2SO4
D. CO2
SUBMIT
Answers
Answer:
C. H₂SO₄
Explanation:
Given expression:
H₂O + SO₃ → H₂SO₄
In the chemical reaction, the product and the reactant have the same species.
Chemical reactions obeys the law of conservation of matter.
This way, atoms combine with one another to give a desired product. The products will contain a mix of the reactants.
Fluorine is not part of the reactantsCarbon is not part of the reactantsCarbon is not part of the reactants.Answer:
cccccccccc
Explanation:
What type of nuclear decay is shown by the reaction below?
239U → He + 234 Th
90
O A. Alpha
O B. Gamma
O C. Fusion
O D. Beta
Answers
Radioactive decay of alpha. When a nucleus undergoes alpha decay, it changes into a separate nucleus and emits an alpha particle in the process.
How does plutonium 239 form from uranium 238?These two beta decays are sufficient to transform a uranium atom into a plutonium atom since each beta decay converts a neutron into a proton. Consequently, a single atom of uranium-238 that absorbs a single neutron and is left alone over a period of time sufficient for it to experience two beta decays (a few weeks or so) will transform into a single atom of pu-239.
Does the fission of plutonium-239 decay?Over 100 radioisotopes with half-lives ranging from fractions of a second to millions of years are created when plutonium-239 or uranium-235 are fissioned. By neutron absorption in the fuel or surrounding materials, more radioisotopes are created.
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What does not represent a compound
Answers
Answer:
Every combination of atoms is a molecule. A compound is a molecule made of atoms from different elements. All compounds are molecules, but not all molecules are compounds. Hydrogen gas (H2) is a molecule, but not a compound because it is made of only one element.Explanation:
What mass of NaCl is needed to produce a 26.4 mol/L with a 1.7 L volume?
Answers
we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.
To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.
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Hello, this is a science task and it is due today I would really appreciate it if you guys can help me answer and explain what is the difference between expansion and contraction:) I will mark brainliest!
Answers
Answer:
Expansion: increase in size Contraction: decrease in size
Explanation:
The increase in size of an object on heating is called expansion where as the decrease in size of an object on cooling is called contraction.
The irreversible isomerization A
B was carried out in a batch reactor and the following concentration time data were obtained:
Time vs Concentration data in a Batch reactor
t 0 3 5 8 10 12 15 7.5
mol/h 4 2.89 2.25 1.45 1.0 0.65 0.25 0.07
Determine the reaction order,
, and the specific reaction a rate constant, k, using any method of your choice.
Answers
The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.
The term "kinetics" refers to the study of reaction rates, which are determined by measuring the concentration of reactants and products as a function of time.Kinetics experiments can be used to determine the reaction rate and order of reaction. A chemical reaction's rate is defined as the change in the concentration of a reactant or product per unit time. The order of a reaction refers to the number of molecules that must react to produce a product. The order of reaction can be determined by measuring the initial rate of the reaction as a function of concentration.Methods for determining the reaction rate order include the initial rate method, the half-life method, and the integrated rate method. The initial rate method determines the reaction order by measuring the initial rate of the reaction at different reactant concentrations. The half-life method determines the reaction order by measuring the time it takes for the reactant concentration to decrease by half.The integrated rate method determines the reaction order by measuring the concentration of the reactant or product at different times.The specific rate constant can be determined by using the Arrhenius equation, which relates the rate constant to the activation energy, temperature, and frequency factor. The frequency factor can be determined by measuring the rate constant at different temperatures.For such more question on polymerization
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