Question 1

Activation energy is the total energy released when a reaction takes place.

Accepted Answer

A) True 
 B)False

Question 2

BrCl is put into an empty 1.00 L container. At equilibrium, the molar concentration of BrCl is 0.382, and that of Br2 is 0.319. Evaluate the equilibrium constant for the following reaction. Br2(g)+ Cl2(g)   2BrCl(g)

Accepted Answer

A) 0.457 
B) 0.699 
C) 1.43 
D) 5.74 
A) 0.457 
B) 0.699 
C) 1.43 
D) 5.74

Question 3

Catalytic action is

Accepted Answer

A) responsible for speeding up and slowing down chemical reactions. 
B) directly opposed by inhibitors. 
C) much more effective at room temperature than higher temperature. 
D) there is more than one correct response. 
A) responsible for speeding up and slowing down chemical reactions. 
B) directly opposed by inhibitors. 
C) much more effective at room temperature than higher temperature. 
D) there is more than one correct response.

Question 4

Which of the following states of matter generally has the lowest entropy?

Accepted Answer

A) a crystalline solid 
B) a liquid 
C) a gas 
D) two have the same entropy 
A) a crystalline solid 
B) a liquid 
C) a gas 
D) two have the same entropy

Question 5

If heat is absorbed when a compound dissolves in water, the compound should be more soluble at higher temperatures.

Accepted Answer

A) True 
 B)False

Question 6

At 20°C, a sample of solid spontaneously sublimes to a gas. This change in state is accompanied by which of the following changes in the solid sample?

Accepted Answer

A) entropy & energy decrease 
B) entropy & energy increase 
C) entropy decreases & energy increases 
D) energy decreases & entropy increases 
A) entropy & energy decrease 
B) entropy & energy increase 
C) entropy decreases & energy increases 
D) energy decreases & entropy increases

Question 7

The effect of a catalyst is to eliminate the activation energy requirement of chemical reactions.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following interpretations of the spontaneous chemical reaction is correct?  V + W → Y + Z + heat

Accepted Answer

A) V is written first because it contains more energy than W, Y, or Z. 
B) The entropy on the left of the equation is greater than that on the right. 
C) The entropy on the right of the equation is greater than that on the left. 
D) Entropy has nothing to do with this chemical equation. 
A) V is written first because it contains more energy than W, Y, or Z. 
B) The entropy on the left of the equation is greater than that on the right. 
C) The entropy on the right of the equation is greater than that on the left. 
D) Entropy has nothing to do with this chemical equation.

Question 9

The energy required to start some spontaneous processes is called ___ .

Accepted Answer

A) internal energy 
B) collision energy 
C) free energy 
D) activation energy 
A) internal energy 
B) collision energy 
C) free energy 
D) activation energy

Question 10

The equilibrium for the following reaction at 1 atm and 25°C lies far to the left.  A possible equilbrium constant for this reaction would be _____ . N2 + 3H2   3NH3

Accepted Answer

A) 0.5 
B) 0 
C) 1.5 
D) impossible to predict K . 
A) 0.5 
B) 0 
C) 1.5 
D) impossible to predict K .

Question 11

A reaction rate can be described in terms of the change in concentration of either a reactant or a product.

Accepted Answer

A) True 
 B)False

Question 12

The reaction conditions for a specific reaction, BCD + HA   →   ABCDH, are correct, but the reaction does not occur. What could be the reason?

Accepted Answer

A) There are no collisions between the molecules. 
B) The collisions of the particles with the container walls remove the required energy because it is transferred to the container molecules. 
C) The orientation of the molecules with respect to each other is not correct for the reaction to occur. 
D) There is more than one answer. 
A) There are no collisions between the molecules. 
B) The collisions of the particles with the container walls remove the required energy because it is transferred to the container molecules. 
C) The orientation of the molecules with respect to each other is not correct for the reaction to occur. 
D) There is more than one answer.

Activation energy is the total energy released when a reaction takes place.

BrCl is put into an empty 1.00 L container. At equilibrium, the molar concentration of BrCl is 0.382, and that of Br₂ is 0.319. Evaluate the equilibrium constant for the following reaction. Br₂(g)+ Cl₂(g) 2BrCl(g)

Catalytic action is

Which of the following states of matter generally has the lowest entropy?

If heat is absorbed when a compound dissolves in water, the compound should be more soluble at higher temperatures.

At 20°C, a sample of solid spontaneously sublimes to a gas. This change in state is accompanied by which of the following changes in the solid sample?

The effect of a catalyst is to eliminate the activation energy requirement of chemical reactions.

Which of the following interpretations of the spontaneous chemical reaction is correct? V + W → Y + Z + heat

The energy required to start some spontaneous processes is called ___ .

The equilibrium for the following reaction at 1 atm and 25°C lies far to the left. A possible equilbrium constant for this reaction would be _____ . N₂ + 3H₂ 3NH₃

A reaction rate can be described in terms of the change in concentration of either a reactant or a product.

The reaction conditions for a specific reaction, BCD + HA → ABCDH, are correct, but the reaction does not occur. What could be the reason?

Matter, Measurements, and Calculations

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Solutions and Colloids

Acids, Bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, Phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

Body Fluids

Filters

Exam 8: Reaction Rates and Equilibrium

Activation energy is the total energy released when a reaction takes place.

BrCl is put into an empty 1.00 L container. At equilibrium, the molar concentration of BrCl is 0.382, and that of Br2 is 0.319. Evaluate the equilibrium constant for the following reaction. Br2(g)+ Cl2(g) 2BrCl(g)

Catalytic action is

Which of the following states of matter generally has the lowest entropy?

If heat is absorbed when a compound dissolves in water, the compound should be more soluble at higher temperatures.

At 20°C, a sample of solid spontaneously sublimes to a gas. This change in state is accompanied by which of the following changes in the solid sample?

The effect of a catalyst is to eliminate the activation energy requirement of chemical reactions.

Which of the following interpretations of the spontaneous chemical reaction is correct? V + W → Y + Z + heat

The energy required to start some spontaneous processes is called ___ .

The equilibrium for the following reaction at 1 atm and 25°C lies far to the left. A possible equilbrium constant for this reaction would be _____ . N2 + 3H2 3NH3

A reaction rate can be described in terms of the change in concentration of either a reactant or a product.

The reaction conditions for a specific reaction, BCD + HA → ABCDH, are correct, but the reaction does not occur. What could be the reason?

Matter, Measurements, and Calculations

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Solutions and Colloids

Acids, Bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, Phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

Body Fluids

Filters

BrCl is put into an empty 1.00 L container. At equilibrium, the molar concentration of BrCl is 0.382, and that of Br₂ is 0.319. Evaluate the equilibrium constant for the following reaction. Br₂(g)+ Cl₂(g) 2BrCl(g)

The equilibrium for the following reaction at 1 atm and 25°C lies far to the left. A possible equilbrium constant for this reaction would be _____ . N₂ + 3H₂ 3NH₃