Exam 7: Energy, Rate and Equilibrium

Consider the decomposition of calcium carbonate shown below.Which of the following statements correctly describes this reaction as it occurs in a test tube? CaCO₃(s) + 42.5 kcal → CaO(s) + CO₂(g)

Free

(Multiple Choice)

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Question 1

Correct Answer:

Verified

When a cold-pack is activated, a chemical reaction occurs and the temperature of the pack contents drops sharply.Which of the following is a correct description of the reaction occurring in the pack?

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(Multiple Choice)

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Question 2

Correct Answer:

Verified

Lowering the activation energy of a reaction will increase its rate.

Free

(True/False)

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Question 3

Correct Answer:

Verified

True

According to the second law of thermodynamics, a system and its surroundings spontaneously tend toward increasing order.

(True/False)

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Question 4

In general, which state of matter has the lowest entropy?

(Multiple Choice)

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Question 5

In general, a liquid state will have higher entropy than a solid state.

(True/False)

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Question 6

What instrument is used for measuring the heat energy absorbed or released in a chemical reaction?

(Multiple Choice)

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Question 7

The reaction shown below is at equilibrium.Use LeChatelier's principle to predict the effect of adding ammonia gas to the equilibrium reaction mixture.

(Multiple Choice)

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Question 8

Which of the following statements concerning the reversible reaction below is FALSE?

(Multiple Choice)

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Question 9

The formation of rust (Fe₂O₃) on an exposed piece of metal typically takes several months.Which of the following statements is NOT a reasonable assumption about this chemical reaction? 4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)

(Multiple Choice)

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Question 10

What is the term used to describe the energy barrier the reactants must overcome in order to form products in a chemical reaction?

(Multiple Choice)

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Question 11

Which term describes the measure of the randomness or disorder of a chemical system?

(Multiple Choice)

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Question 12

In the industrial synthesis of ammonia, the equilibrium constant expression may be written as: Calculate the value of this equilibrium constant, if the equilibrium concentration of nitrogen in the reaction mixture at 600°C if [N₂] = 4.53 M; [H₂] = 2)49 M; and [NH₃] = 7.62 M.

(Multiple Choice)

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Question 13

The amount of heat necessary to raise 1 gram of a substance by 1 degree Celsius is known as which of the following?

(Multiple Choice)

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Question 14

A reversible reaction is said to have reached equilibrium when which of the following conditions is established?

(Multiple Choice)

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Question 15

The order of a reaction with respect to any reactant is shown in the rate equation.

(True/False)

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Question 16

Which one of the following actions can alter the activation energy of a reaction?

(Multiple Choice)

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Question 17

Which statement concerning energy changes in chemical reactions is FALSE?

(Multiple Choice)

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Question 18

Exothermic reactions are always spontaneous.

(True/False)

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Question 19

Reactants and products that are aqueous solutions do not appear in the equilibrium constant expression.

(True/False)

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Question 20

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Exam 7: Energy, Rate and Equilibrium

Consider the decomposition of calcium carbonate shown below.Which of the following statements correctly describes this reaction as it occurs in a test tube? CaCO3(s) + 42.5 kcal → CaO(s) + CO2(g)

When a cold-pack is activated, a chemical reaction occurs and the temperature of the pack contents drops sharply.Which of the following is a correct description of the reaction occurring in the pack?

Lowering the activation energy of a reaction will increase its rate.

According to the second law of thermodynamics, a system and its surroundings spontaneously tend toward increasing order.

In general, which state of matter has the lowest entropy?

In general, a liquid state will have higher entropy than a solid state.

What instrument is used for measuring the heat energy absorbed or released in a chemical reaction?

The reaction shown below is at equilibrium.Use LeChatelier's principle to predict the effect of adding ammonia gas to the equilibrium reaction mixture.

Which of the following statements concerning the reversible reaction below is FALSE?

The formation of rust (Fe2O3) on an exposed piece of metal typically takes several months.Which of the following statements is NOT a reasonable assumption about this chemical reaction? 4Fe(s) + 3O2(g) → 2Fe2O3(s)

What is the term used to describe the energy barrier the reactants must overcome in order to form products in a chemical reaction?

Which term describes the measure of the randomness or disorder of a chemical system?

In the industrial synthesis of ammonia, the equilibrium constant expression may be written as: Calculate the value of this equilibrium constant, if the equilibrium concentration of nitrogen in the reaction mixture at 600°C if [N2] = 4.53 M; [H2] = 2)49 M; and [NH3] = 7.62 M.

The amount of heat necessary to raise 1 gram of a substance by 1 degree Celsius is known as which of the following?

A reversible reaction is said to have reached equilibrium when which of the following conditions is established?

The order of a reaction with respect to any reactant is shown in the rate equation.

Which one of the following actions can alter the activation energy of a reaction?

Which statement concerning energy changes in chemical reactions is FALSE?

Exothermic reactions are always spontaneous.

Reactants and products that are aqueous solutions do not appear in the equilibrium constant expression.

Chemistry:methods and Measurement

The Structure of the Atom and the Periodic Table

Structure and Properties of Ionic and Covalent Compounds

Calculations, Chemical Changes, and the Chemical Equation

States of Matter- Gases, Liquids, and Solids

Solutions

Acids and Bases

The Nucleus, Radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry- the Saturated Hydrocarbons

The Unsaturated Hydrocarbons- Alkenes, Alkynes, and Aromatics

Alcohols, Phenols, Thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

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Consider the decomposition of calcium carbonate shown below.Which of the following statements correctly describes this reaction as it occurs in a test tube? CaCO₃(s) + 42.5 kcal → CaO(s) + CO₂(g)

The formation of rust (Fe₂O₃) on an exposed piece of metal typically takes several months.Which of the following statements is NOT a reasonable assumption about this chemical reaction? 4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)

In the industrial synthesis of ammonia, the equilibrium constant expression may be written as: Calculate the value of this equilibrium constant, if the equilibrium concentration of nitrogen in the reaction mixture at 600°C if [N₂] = 4.53 M; [H₂] = 2)49 M; and [NH₃] = 7.62 M.