Question 1

Which of the following statements about energy are true? Select all that apply.

Accepted Answer

A)  Energy can be transformed from one form to another. 
B)  Energy is measured in kelvin, K. 
C)  Energy is the capacity of an entity to do work. 
D)  Energy can be destroyed. 
E)  Energy cannot be created. 
A)  Energy can be transformed from one form to another. 
B)  Energy is measured in kelvin, K. 
C)  Energy is the capacity of an entity to do work. 
D)  Energy can be destroyed. 
E)  Energy cannot be created. A,C,E

Question 2

Match the correct words with the numbered gaps in the following relationship:
  
-Reaction

Accepted Answer

A)  3 
B)  2 
C)  4 
A)  3 
B)  2 
C)  4 B

Question 3

Which one of the following is the correct description of a closed system?

Accepted Answer

A)  Neither matter nor energy can be transferred between the system and surroundings. 
B)  Only matter can be transferred between the system and surroundings. 
C)  Only energy can be transferred between the system and surroundings. 
D)  Both energy and matter can be transferred between the system and surroundings. 
A)  Neither matter nor energy can be transferred between the system and surroundings. 
B)  Only matter can be transferred between the system and surroundings. 
C)  Only energy can be transferred between the system and surroundings. 
D)  Both energy and matter can be transferred between the system and surroundings. C

Question 4

Which of the following are the correct units for values of entropy?

Accepted Answer

A)  mol 
B)  J mol-1 
C)  mol K-1 
D)  mol J-1 K-1 
E)  J K-1 mol-1 
A)  mol 
B)  J mol-1 
C)  mol K-1 
D)  mol J-1 K-1 
E)  J K-1 mol-1

Question 5

Match the correct words with the numbered gaps in the following relationship:
  
-Products

Accepted Answer

A)  2 
B)  1 
C)  3 
A)  2 
B)  1 
C)  3

Question 6

Which one of the following is not associated with an increase in entropy?

Accepted Answer

A)  The folding of a polypeptide chain into a more compact three-dimensional shape. 
B)  The melting of ice to yield liquid water. 
C)  The evaporation of sweat from the surface of the skin 
D)  The breakdown of glycogen into its component glucose subunits. 
A)  The folding of a polypeptide chain into a more compact three-dimensional shape. 
B)  The melting of ice to yield liquid water. 
C)  The evaporation of sweat from the surface of the skin 
D)  The breakdown of glycogen into its component glucose subunits.

Question 7

Which of the following statements about energy are true? Select all that apply.

Accepted Answer

A)  Bond cleavage generates energy. 
B)  Endothermic reactions absorb energy. 
C)  Exergonic reactions release energy. 
D)  Energy can only flow from system to surroundings. 
A)  Bond cleavage generates energy. 
B)  Endothermic reactions absorb energy. 
C)  Exergonic reactions release energy. 
D)  Energy can only flow from system to surroundings.

Question 8

Which of the following statements about the enthalpy change of reaction are true? Select all that apply.

Accepted Answer

A)  It has units of J. 
B)  It is represented by the symbol F1F1F1S1F1F1F10G. 
C)  It measures the exchange of energy with the surroundings during the course of the reaction. 
D)  It is a measure of the bond-breaking and bond-making which occurs during the course of a reaction. 
E)  It always has a positive value. 
A)  It has units of J. 
B)  It is represented by the symbol F1F1F1S1F1F1F10G. 
C)  It measures the exchange of energy with the surroundings during the course of the reaction. 
D)  It is a measure of the bond-breaking and bond-making which occurs during the course of a reaction. 
E)  It always has a positive value.

Question 9

Match the correct words with the numbered gaps in the following relationship:
  
-Reactants

Accepted Answer

A)  4 
B)  3 
C)  5 
A)  4 
B)  3 
C)  5

Question 10

Match the characteristic of a chemical reaction with the name given to that type of reaction.
-ΔH is negative

Accepted Answer

A)  Endothermic 
B)  Exergonic 
C)  Endergonic 
D)  Exothermic 
A)  Endothermic 
B)  Exergonic 
C)  Endergonic 
D)  Exothermic

Question 11

Which of the following statements about heat and energy are true? Select all that apply.

Accepted Answer

A)  An object with a high temperature has more energy than an object with a low temperature. 
B)  Heat is the transfer of energy from hot to cold. 
C)  'Heat' and 'temperature' mean the same thing. 
D)  The transfer of heat from hot to cold is a non-spontaneous process. 
A)  An object with a high temperature has more energy than an object with a low temperature. 
B)  Heat is the transfer of energy from hot to cold. 
C)  'Heat' and 'temperature' mean the same thing. 
D)  The transfer of heat from hot to cold is a non-spontaneous process.

Question 12

How much work needs to be done to lift a 3 kg weight to a height of 3 m?

Accepted Answer

A)  1 kJ 
B)  9 kJ 
C)  900 J 
D)  90 N 
E)  90 J 
A)  1 kJ 
B)  9 kJ 
C)  900 J 
D)  90 N 
E)  90 J

Question 13

Match the characteristic of a chemical reaction with the name given to that type of reaction.
-ΔG is positive

Accepted Answer

A)  Endothermic 
B)  Exergonic 
C)  Endergonic 
D)  Exothermic 
A)  Endothermic 
B)  Exergonic 
C)  Endergonic 
D)  Exothermic

Question 14

Match the characteristic of a chemical reaction with the name given to that type of reaction.
-ΔG is negative

Accepted Answer

A)  Endothermic 
B)  Exergonic 
C)  Endergonic 
D)  Exothermic 
A)  Endothermic 
B)  Exergonic 
C)  Endergonic 
D)  Exothermic

Question 15

Match the characteristic of a chemical reaction with the name given to that type of reaction.
-ΔH is positive

Accepted Answer

A)  Endothermic 
B)  Exergonic 
C)  Endergonic 
D)  Exothermic 
A)  Endothermic 
B)  Exergonic 
C)  Endergonic 
D)  Exothermic

Question 16

Which one of the following statements does not apply to an endothermic reaction?

Accepted Answer

A)  The enthalpy of the system increases. 
B)  The entropy of the system increases. 
C)  Energy flows from the surroundings to the system. 
D)  The enthalpy of the surroundings decreases. 
E)  The energy of the universe decreases. 
A)  The enthalpy of the system increases. 
B)  The entropy of the system increases. 
C)  Energy flows from the surroundings to the system. 
D)  The enthalpy of the surroundings decreases. 
E)  The energy of the universe decreases.

Question 17

If the products of a reaction have a higher Gibbs free energy than the reactants, which of the following statements are true? Select all that apply.

Accepted Answer

A)  The products are more stable than the reactants. 
B)  The products are less stable than the reactants. 
C)  The reaction has consumed more energy than it released. 
D)  The reaction is endergonic. 
E)  F1F1F1S1F1F1F10G for the reaction is negative. 
A)  The products are more stable than the reactants. 
B)  The products are less stable than the reactants. 
C)  The reaction has consumed more energy than it released. 
D)  The reaction is endergonic. 
E)  F1F1F1S1F1F1F10G for the reaction is negative.

Question 18

A mug of tea is an example of which one of the following?

Accepted Answer

A)  An open system. 
B)  A closed system. 
C)  An isolated system. 
A)  An open system. 
B)  A closed system. 
C)  An isolated system.

Question 19

Which one of the following statements about Gibbs free energy is true?

Accepted Answer

A)  All the energy generated by a reaction is free to do work. 
B)  The Gibbs free energy change for a reaction is not dependent on temperature. 
C)  If the products of a reaction have less Gibbs free energy than the reactants, the reaction is not spontaneous. 
D)  A reaction with a negative ΔG cannot happen. 
E)  Catabolic reactions typically have a negative ΔG. 
A)  All the energy generated by a reaction is free to do work. 
B)  The Gibbs free energy change for a reaction is not dependent on temperature. 
C)  If the products of a reaction have less Gibbs free energy than the reactants, the reaction is not spontaneous. 
D)  A reaction with a negative ΔG cannot happen. 
E)  Catabolic reactions typically have a negative ΔG.

Question 20

Which one of the following phrases correctly completes the sentence "Chemical reactions occur spontaneously…"

Accepted Answer

A)  …if F1F1F1S1F1F1F10H for the reaction is < 0. 
B)  …if F1F1F1S1F1F1F10S for the reaction is < 0. 
C)  …if the Gibbs free energy change for the reaction is positive. 
D)  …if the Gibbs free energy for the reaction is negative. 
E)  None of the phrases given 
A)  …if F1F1F1S1F1F1F10H for the reaction is < 0. 
B)  …if F1F1F1S1F1F1F10S for the reaction is < 0. 
C)  …if the Gibbs free energy change for the reaction is positive. 
D)  …if the Gibbs free energy for the reaction is negative. 
E)  None of the phrases given

Which of the following statements about energy are true? Select all that apply.

Match the correct words with the numbered gaps in the following relationship: -Reaction

Which one of the following is the correct description of a closed system?

Which of the following are the correct units for values of entropy?

Match the correct words with the numbered gaps in the following relationship: -Products

Which one of the following is not associated with an increase in entropy?

Which of the following statements about energy are true? Select all that apply.

Which of the following statements about the enthalpy change of reaction are true? Select all that apply.

Match the correct words with the numbered gaps in the following relationship: -Reactants

Match the characteristic of a chemical reaction with the name given to that type of reaction. -ΔH is negative

Which of the following statements about heat and energy are true? Select all that apply.

How much work needs to be done to lift a 3 kg weight to a height of 3 m?

Match the characteristic of a chemical reaction with the name given to that type of reaction. -ΔG is positive

Match the characteristic of a chemical reaction with the name given to that type of reaction. -ΔG is negative

Match the characteristic of a chemical reaction with the name given to that type of reaction. -ΔH is positive

Which one of the following statements does not apply to an endothermic reaction?

If the products of a reaction have a higher Gibbs free energy than the reactants, which of the following statements are true? Select all that apply.

A mug of tea is an example of which one of the following?

Which one of the following statements about Gibbs free energy is true?

Which one of the following phrases correctly completes the sentence "Chemical reactions occur spontaneously…"

Chemical Analysis: Characterizing Chemical Compounds

Acids, Bases, and Buffer Solutions: Life in an Aqueous Environment

Kinetics: What Affects the Speed of a Reaction

Equilibria: How Far Do Reactions Go

Reaction Mechanisms: The Chemical Changes That Drive the Chemistry of Life

Chemical Reactions, Oxidation, and Reduction: Bringing Molecules to Life

Metals in Biology: Life Beyond Carbon

Biological Macromolecules: The Infrastructure of Life

Isomerism: Generating Chemical Variety

Molecular Shape and Structure: Life in Three Dimensions

Functional Groups: Adding Function to the Framework of Life

Hydrocarbons: The Framework of Life

Moles, Concentrations, and Dilutions: Making Sense of Chemical Numbers

Molecular Interactions: Holding It All Together

Compounds and Chemical Bonding: Bringing Atoms Together

Atoms: The Foundations of Life

Introduction: Why Biologists Need Chemistry

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Exam 14: Energy: What Makes Reactions Go

Which of the following statements about energy are true? Select all that apply.

Match the correct words with the numbered gaps in the following relationship: -Reaction

Which one of the following is the correct description of a closed system?

Which of the following are the correct units for values of entropy?

Match the correct words with the numbered gaps in the following relationship: -Products

Which one of the following is not associated with an increase in entropy?

Which of the following statements about energy are true? Select all that apply.

Which of the following statements about the enthalpy change of reaction are true? Select all that apply.

Match the correct words with the numbered gaps in the following relationship: -Reactants

Match the characteristic of a chemical reaction with the name given to that type of reaction. -ΔH is negative

Which of the following statements about heat and energy are true? Select all that apply.

How much work needs to be done to lift a 3 kg weight to a height of 3 m?

Match the characteristic of a chemical reaction with the name given to that type of reaction. -ΔG is positive

Match the characteristic of a chemical reaction with the name given to that type of reaction. -ΔG is negative

Match the characteristic of a chemical reaction with the name given to that type of reaction. -ΔH is positive

Which one of the following statements does not apply to an endothermic reaction?

If the products of a reaction have a higher Gibbs free energy than the reactants, which of the following statements are true? Select all that apply.

A mug of tea is an example of which one of the following?

Which one of the following statements about Gibbs free energy is true?

Which one of the following phrases correctly completes the sentence "Chemical reactions occur spontaneously…"

Chemical Analysis: Characterizing Chemical Compounds

Acids, Bases, and Buffer Solutions: Life in an Aqueous Environment

Kinetics: What Affects the Speed of a Reaction

Equilibria: How Far Do Reactions Go

Reaction Mechanisms: The Chemical Changes That Drive the Chemistry of Life

Chemical Reactions, Oxidation, and Reduction: Bringing Molecules to Life

Metals in Biology: Life Beyond Carbon

Biological Macromolecules: The Infrastructure of Life

Isomerism: Generating Chemical Variety

Molecular Shape and Structure: Life in Three Dimensions

Functional Groups: Adding Function to the Framework of Life

Hydrocarbons: The Framework of Life

Moles, Concentrations, and Dilutions: Making Sense of Chemical Numbers

Molecular Interactions: Holding It All Together

Compounds and Chemical Bonding: Bringing Atoms Together

Atoms: The Foundations of Life

Introduction: Why Biologists Need Chemistry

Filters