Question 1

What is the kinetic energy of a 145 g baseball traveling at 89.9 mi/hr?

Accepted Answer

A) (1.17 × 105 J) 
B) 2.91 J 
C) 234 J 
D) 5.83 
E) 117 J 
A) (1.17 × 105 J) 
B) 2.91 J 
C) 234 J 
D) 5.83 
E) 117 J

Question 2

An 6.11 g sample of calcium carbonate [CaCO3 (s)] absorbs   of heat,upon which the temperature of the sample increases from   to   What is the specific heat of calcium carbonate?

Accepted Answer

A) 0.82 J/g-K 
B) -0.82 J/g-K 
C) 31 J/g-K 
D) 230 J/g-K 
E) 8600 J/g-K 
A) 0.82 J/g-K 
B) -0.82 J/g-K 
C) 31 J/g-K 
D) 230 J/g-K 
E) 8600 J/g-K

Question 3

Given the data in the table below,ΔH°rxn for the reaction 2Ag2S (s)+ O2 (g)→ 2Ag2O (s)+ 2S (s)
Is ________ kJ.

Accepted Answer

A) -1.6 
B) +1.6 
C) -3.2 
D) +3.2 
E) The ΔH°f of S (s)and of O2 (g)are needed for the calculation. 
A) -1.6 
B) +1.6 
C) -3.2 
D) +3.2 
E) The ΔH°f of S (s)and of O2 (g)are needed for the calculation.

Question 4

Calculate the kinetic energy in joules of a 150 lb jogger (68.1 kg)traveling at 12.0 mile/hr (5.36 m/s).

Accepted Answer

A) 1.96 × 103 J 
B) 365 J 
C) 978 J 
D) 183 J 
E) 68.1 J 
A) 1.96 × 103 J 
B) 365 J 
C) 978 J 
D) 183 J 
E) 68.1 J

Question 5

The value of ΔH° for the following reaction is -3351 kJ: 2Al (s)+ 3O2(g)→ 2Al2O3(s)
The value of ΔH°f for Al2
    (s)is ________ kJ.

Accepted Answer

A) -3351 
B) -1676 
C) -32.86 
D) -16.43 
E) +3351 
A) -3351 
B) -1676 
C) -32.86 
D) -16.43 
E) +3351

Question 6

All of the following statements are true except ________.

Accepted Answer

A) Internal energy is a state function. 
B) The enthalpy change for a reaction is equal in magnitude, but opposite in sign, to the enthalpy change for the reverse reaction. 
C) The enthalpy change for a reaction depends on the state of the reactants and products. 
D) The enthalpy of a reaction is equal to the heat of the reaction. 
E) Enthalpy is an intensive property. 
A) Internal energy is a state function. 
B) The enthalpy change for a reaction is equal in magnitude, but opposite in sign, to the enthalpy change for the reverse reaction. 
C) The enthalpy change for a reaction depends on the state of the reactants and products. 
D) The enthalpy of a reaction is equal to the heat of the reaction. 
E) Enthalpy is an intensive property.

Question 7

For the combustion reaction of methane,ΔH°f is zero for ________. CH4 (g)+ O2 (g)→ 2H2O(g)+ CO2 (g)

Accepted Answer

A) O2 (g) 
B) CH4 (g) 
C) CO2 (g) 
D) H2O (g) 
E) Both O2 (g)and CH4 (g) 
A) O2 (g) 
B) CH4 (g) 
C) CO2 (g) 
D) H2O (g) 
E) Both O2 (g)and CH4 (g)

Question 8

The ΔE of a system that releases 12.4 J of heat and does 4.2 J of work on the surroundings is ________ J.

Accepted Answer

A) 16.6 
B) 12.4 
C) 4.2 
D) -16.6 
E) -8.2 
A) 16.6 
B) 12.4 
C) 4.2 
D) -16.6 
E) -8.2

Question 9

The temperature of a 35.1 g sample of iron increases from   to   If the specific heat of iron is   how many joules of heat are absorbed?

Accepted Answer

A) 115 J 
B) 0.0936 J 
C) -115 J 
D) 0.722 J 
E) 3.29 J 
A) 115 J 
B) 0.0936 J 
C) -115 J 
D) 0.722 J 
E) 3.29 J

Question 10

A 3.00 L pitcher of sweetened ice tea contains 600.g of sugar.Assuming that the sugar is the only fuel source,what is the fuel value (in kJ)of a 250.mL serving? The respective fuel values for protein,fat,and carbohydrate are 17,38,and 17 kJ/g,respectively.

Accepted Answer

A) 8.50 × 102 kJ 
B) 10.2 × 104 kJ 
C) 2.55 × 103 kJ 
D) 38 kJ 
E) 17 kJ 
A) 8.50 × 102 kJ 
B) 10.2 × 104 kJ 
C) 2.55 × 103 kJ 
D) 38 kJ 
E) 17 kJ

Question 11

At what velocity (m/s)must a 417.3 g object be moving in order to possess a kinetic energy of

Accepted Answer

A) 0.12 m/s 
B) 26 m/s 
C) 0.015 m/s 
D) 0.0038 m/s 
E) 0.00024 m/s 
A) 0.12 m/s 
B) 26 m/s 
C) 0.015 m/s 
D) 0.0038 m/s 
E) 0.00024 m/s

Question 12

Calculate the work (kJ)done during a reaction in which the internal volume expands from   to   against an outside pressure of

Accepted Answer

A) -7.3 kJ 
B) 17 kJ 
C) 7.3 kJ 
D) -17 kJ 
E) 0 kJ; No work is done. 
A) -7.3 kJ 
B) 17 kJ 
C) 7.3 kJ 
D) -17 kJ 
E) 0 kJ; No work is done.

Question 13

Given the data in the table below,ΔH°rxn for the reaction SO3 (g)+ H2O (l)→ H2SO4 (l)
Is ________ kJ.

Accepted Answer

A) -132 
B) 1496 
C) 704 
D) -704 
E) -2.16 × 103 
A) -132 
B) 1496 
C) 704 
D) -704 
E) -2.16 × 103

Question 14

Given the data in the table below,ΔH°rxn for the reaction Ag2O (s)+ H2S (g)→ Ag2S (s)+ H2O (l)
Is ________ kJ.

Accepted Answer

A) -267 
B) -370 
C) -202 
D) -308 
E) More data are needed to complete the calculation. 
A) -267 
B) -370 
C) -202 
D) -308 
E) More data are needed to complete the calculation.

Question 15

For the following reactions,the ΔH°rxn is NOT equal to ΔH°f for the product except for ________.

Accepted Answer

A) H2 (g)+ 1/2 O2 (g)→ H2O (l) 
B) H2 (g)+ O2 (g)→ H2O2 (l) 
C) 2C (s, graphite)+ 2H2 (g)→ C2H4 (g) 
D) 1/2 N2 (g)+ O2 (g)→ NO2 (g) 
E) all of the above 
A) H2 (g)+ 1/2 O2 (g)→ H2O (l) 
B) H2 (g)+ O2 (g)→ H2O2 (l) 
C) 2C (s, graphite)+ 2H2 (g)→ C2H4 (g) 
D) 1/2 N2 (g)+ O2 (g)→ NO2 (g) 
E) all of the above

Question 16

The internal energy of a system ________.

Accepted Answer

A) is the sum of the kinetic energy of all of its components 
B) is the sum of the rotational, vibrational, and translational energies of all of its components 
C) refers only to the energies of the nuclei of the atoms of the component molecules 
D) is the sum of the potential and kinetic energies of the components 
E) none of the above 
A) is the sum of the kinetic energy of all of its components 
B) is the sum of the rotational, vibrational, and translational energies of all of its components 
C) refers only to the energies of the nuclei of the atoms of the component molecules 
D) is the sum of the potential and kinetic energies of the components 
E) none of the above

Question 17

For the following reactions,the ΔH°rxn is NOT equal to ΔH°f for the product except for ________.

Accepted Answer

A) N2 (g)+ O2 (g)→ 2NO (g) 
B) 2H2 (g)+ O2 (g)→ 2H2O (l) 
C) 2H2 (g)+ O2 (g)→ 2H2O (g) 
D) 2C (s, graphite)+ 2H2(g)→ C2H4 (g) 
E) H2O (l)+ 1/2 O2 (g)→ H2O2 (l) 
A) N2 (g)+ O2 (g)→ 2NO (g) 
B) 2H2 (g)+ O2 (g)→ 2H2O (l) 
C) 2H2 (g)+ O2 (g)→ 2H2O (g) 
D) 2C (s, graphite)+ 2H2(g)→ C2H4 (g) 
E) H2O (l)+ 1/2 O2 (g)→ H2O2 (l)

Question 18

The kinetic energy of a 10.3 g golf ball traveling at 48.0 m/s is ________ J.

Accepted Answer

A) 1.20 × 103 
B) 66 
C) 11.9 
D) 1.3 × 102 
E) 23.7 
A) 1.20 × 103 
B) 66 
C) 11.9 
D) 1.3 × 102 
E) 23.7

Question 19

At what velocity (m/s)must a   object be moving in order to possess a kinetic energy of

Accepted Answer

A) 0.35 m/s 
B) 2.8 m/s 
C) 0.13 m/s 
D) 0.031 m/s 
E) 0.016 m/s 
A) 0.35 m/s 
B) 2.8 m/s 
C) 0.13 m/s 
D) 0.031 m/s 
E) 0.016 m/s

Question 20

A 50.0-g sample of liquid water at 25.0 °C is mixed with 23.0 g of water at 79.0 °C.The final temperature of the water is ________ °C.

Accepted Answer

A) 123 
B) 27.3 
C) 52.0 
D) 231 
E) 42.0 
A) 123 
B) 27.3 
C) 52.0 
D) 231 
E) 42.0

Exam 5: Thermochemistry

What is the kinetic energy of a 145 g baseball traveling at 89.9 mi/hr?

An 6.11 g sample of calcium carbonate [CaCO3 (s)] absorbs of heat,upon which the temperature of the sample increases from to What is the specific heat of calcium carbonate?

Given the data in the table below,ΔH°rxn for the reaction 2Ag2S (s)+ O2 (g)→ 2Ag2O (s)+ 2S (s) Is ________ kJ.

Calculate the kinetic energy in joules of a 150 lb jogger (68.1 kg)traveling at 12.0 mile/hr (5.36 m/s).

The value of ΔH° for the following reaction is -3351 kJ: 2Al (s)+ 3O2(g)→ 2Al2O3(s) The value of ΔH°f for Al2 (s)is ________ kJ.

All of the following statements are true except ________.

For the combustion reaction of methane,ΔH°f is zero for ________. CH4 (g)+ O2 (g)→ 2H2O(g)+ CO2 (g)

The ΔE of a system that releases 12.4 J of heat and does 4.2 J of work on the surroundings is ________ J.

The temperature of a 35.1 g sample of iron increases from to If the specific heat of iron is how many joules of heat are absorbed?

A 3.00 L pitcher of sweetened ice tea contains 600.g of sugar.Assuming that the sugar is the only fuel source,what is the fuel value (in kJ)of a 250.mL serving? The respective fuel values for protein,fat,and carbohydrate are 17,38,and 17 kJ/g,respectively.

At what velocity (m/s)must a 417.3 g object be moving in order to possess a kinetic energy of

Calculate the work (kJ)done during a reaction in which the internal volume expands from to against an outside pressure of

Given the data in the table below,ΔH°rxn for the reaction SO3 (g)+ H2O (l)→ H2SO4 (l) Is ________ kJ.

Given the data in the table below,ΔH°rxn for the reaction Ag2O (s)+ H2S (g)→ Ag2S (s)+ H2O (l) Is ________ kJ.

For the following reactions,the ΔH°rxn is NOT equal to ΔH°f for the product except for ________.

The internal energy of a system ________.

For the following reactions,the ΔH°rxn is NOT equal to ΔH°f for the product except for ________.

The kinetic energy of a 10.3 g golf ball traveling at 48.0 m/s is ________ J.

At what velocity (m/s)must a object be moving in order to possess a kinetic energy of

A 50.0-g sample of liquid water at 25.0 °C is mixed with 23.0 g of water at 79.0 °C.The final temperature of the water is ________ °C.

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

An 6.11 g sample of calcium carbonate [CaCO₃ (s)] absorbs of heat,upon which the temperature of the sample increases from to What is the specific heat of calcium carbonate?

Given the data in the table below,ΔH°_rxn for the reaction 2Ag₂S (s)+ O₂ (g)→ 2Ag₂O (s)+ 2S (s) Is ________ kJ.

The value of ΔH° for the following reaction is -3351 kJ: 2Al (s)+ 3O₂(g)→ 2Al₂O₃(s) The value of ΔH°_f for Al₂ (s)is ________ kJ.

For the combustion reaction of methane,ΔH°_f is zero for ________. CH₄ (g)+ O₂ (g)→ 2H₂O(g)+ CO₂ (g)

Given the data in the table below,ΔH°_rxn for the reaction SO₃ (g)+ H₂O (l)→ H₂SO₄ (l) Is ________ kJ.

Given the data in the table below,ΔH°_rxn for the reaction Ag₂O (s)+ H₂S (g)→ Ag₂S (s)+ H₂O (l) Is ________ kJ.

For the following reactions,the ΔH°_rxn is NOT equal to ΔH°_f for the product except for ________.

For the following reactions,the ΔH°_rxn is NOT equal to ΔH°_f for the product except for ________.