Question 1

The enthalpy change for a reaction depends on the path by which the reactants are converted to products.

Accepted Answer

A) True 
 B)False

Question 2

The small well-defined part of a universe in which we are interested is referred to as a(n) _____.

Accepted Answer

The answer of The small well-defined part of a universe...

Question 3

The _____ of a system is a complete description of the system at a given time, including its temperature and pressure, the amount of matter it contains, its chemical composition, and the physical state of the matter.

Accepted Answer

A)  internal energy 
B)  state 
C)  enthalpy 
D)  work 
E)  entropy

Question 4

_____ is defined as the ratio of useful work accomplished to the energy expended.

Accepted Answer

The answer of _____ is defined as the ratio of...

Question 5

The structure given below is the structure of _____.

Accepted Answer

A)  alanine 
B)  glycine 
C)  valine 
D)  lysine 
E)  serine

Question 6

A car weighing 1200.0 kg is travelling at a 225 cm/s. The kinetic energy of the car is _____ J.

Accepted Answer

A)  5.06 × 103 
B)  3.04 × 103 
C)  4.23 × 103 
D)  2.25 × 103 
E)  1.20 × 103

Question 7

Coal liquefaction techniques are economically less attractive than the production of liquid fuels from petroleum.

Accepted Answer

A) True 
 B)False

Question 8

Define heat capacity. What are the factors that determine the heat capacity of an object?

Accepted Answer

The answer of Define heat capacity. What are the factors...

Question 9

How are the enthalpy changes that accompany combustion reactions measured using a bomb calorimeter?

Accepted Answer

The answer of How are the enthalpy changes that accompany...

Question 10

The caloric content of a meal that contains 81.5 g of water, 76.8 g of protein, 25.8 g of fat, 12.0 g of carbohydrates, and 2.0 g of minerals is approximately _____ Cal.

Accepted Answer

A)  842 
B)  587 
C)  971 
D)  1030 
E)  902

Question 11

Consider the equation CH4(g) + 2O2(g) → CO2(g) + 2H2O (l). The ΔHocomb of methane is _____ kJ/mol.
(Given ΔHof values of methane, carbon dioxide, and water is -74.6, -393.5, and -285.8 kJ/mol respectively)

Accepted Answer

A)  -890.5 
B)  -799.8 
C)  -1033 
D)  890.5 
E)  799.8

Question 12

The amino acids that a human body is unable to synthesize from the other compounds are called _____.

Accepted Answer

The answer of The amino acids that a human body...

Question 13

Primary sources of energy like natural gas are more efficient when used directly than in the form of a secondary source such as electricity.

Accepted Answer

A) True 
 B)False

Question 14

The energy contained in batteries is an example of chemical energy.

Accepted Answer

A) True 
 B)False

Question 15

The potential energy associated with a person weighing 78 kg standing at the edge of a diving board 4.0 ft above the water level is _____ $ \frac{\mathrm{kg} \cdot \mathrm{m}^{2}}{\mathrm{~s}^{2}} $ .

Accepted Answer

A)  3.0 × 102 
B)  5.9 × 103 
C)  9.3 × 103 
D)  9.3 × 102 
E)  5.9 × 102

Question 16

The structure of coal is more similar to an aliphatic hydrocarbon structure than an aromatic hydrocarbon.

Accepted Answer

A) True 
 B)False

Question 17

State Hess's law. How can it be used to calculate the enthalpy change of a reaction that cannot be observed directly?

Accepted Answer

The answer of State Hess's law. How can it be...

Question 18

_____ is a unit used to indicate the caloric content of food.

Accepted Answer

The answer of _____ is a unit used to indicate...

Question 19

The magnitude of thermal change of an object depends only on the amount of thermal energy transferred.

Accepted Answer

A) True 
 B)False

Question 20

A closed system can exchange energy but not matter with its surroundings.

Accepted Answer

A) True 
 B)False

Exam 5: Energy Changes in Chemical Reactions

The enthalpy change for a reaction depends on the path by which the reactants are converted to products.

The small well-defined part of a universe in which we are interested is referred to as a(n) _____.

The _____ of a system is a complete description of the system at a given time, including its temperature and pressure, the amount of matter it contains, its chemical composition, and the physical state of the matter.

_____ is defined as the ratio of useful work accomplished to the energy expended.

The structure given below is the structure of _____.

A car weighing 1200.0 kg is travelling at a 225 cm/s. The kinetic energy of the car is _____ J.

Coal liquefaction techniques are economically less attractive than the production of liquid fuels from petroleum.

Define heat capacity. What are the factors that determine the heat capacity of an object?

How are the enthalpy changes that accompany combustion reactions measured using a bomb calorimeter?

The caloric content of a meal that contains 81.5 g of water, 76.8 g of protein, 25.8 g of fat, 12.0 g of carbohydrates, and 2.0 g of minerals is approximately _____ Cal.

Consider the equation CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O (l) . The ΔH^o_comb of methane is _____ kJ/mol. (Given ΔH^o_f values of methane, carbon dioxide, and water is -74.6, -393.5, and -285.8 kJ/mol respectively)

The amino acids that a human body is unable to synthesize from the other compounds are called _____.

Primary sources of energy like natural gas are more efficient when used directly than in the form of a secondary source such as electricity.

The energy contained in batteries is an example of chemical energy.

The potential energy associated with a person weighing 78 kg standing at the edge of a diving board 4.0 ft above the water level is _____ $\frac{\mathrm{kg} \cdot \mathrm{m}^{2}}{\mathrm{~s}^{2}}$ .

The structure of coal is more similar to an aliphatic hydrocarbon structure than an aromatic hydrocarbon.

State Hess's law. How can it be used to calculate the enthalpy change of a reaction that cannot be observed directly?

_____ is a unit used to indicate the caloric content of food.

The magnitude of thermal change of an object depends only on the amount of thermal energy transferred.

A closed system can exchange energy but not matter with its surroundings.

Exam 5: Energy Changes in Chemical Reactions

The enthalpy change for a reaction depends on the path by which the reactants are converted to products.

The small well-defined part of a universe in which we are interested is referred to as a(n) _____.

The _____ of a system is a complete description of the system at a given time, including its temperature and pressure, the amount of matter it contains, its chemical composition, and the physical state of the matter.

_____ is defined as the ratio of useful work accomplished to the energy expended.

The structure given below is the structure of _____.

A car weighing 1200.0 kg is travelling at a 225 cm/s. The kinetic energy of the car is _____ J.

Coal liquefaction techniques are economically less attractive than the production of liquid fuels from petroleum.

Define heat capacity. What are the factors that determine the heat capacity of an object?

How are the enthalpy changes that accompany combustion reactions measured using a bomb calorimeter?

The caloric content of a meal that contains 81.5 g of water, 76.8 g of protein, 25.8 g of fat, 12.0 g of carbohydrates, and 2.0 g of minerals is approximately _____ Cal.

Consider the equation CH4(g) + 2O2(g) → CO2(g) + 2H2O (l) . The ΔHocomb of methane is _____ kJ/mol. (Given ΔHof values of methane, carbon dioxide, and water is -74.6, -393.5, and -285.8 kJ/mol respectively)

The amino acids that a human body is unable to synthesize from the other compounds are called _____.

Primary sources of energy like natural gas are more efficient when used directly than in the form of a secondary source such as electricity.

The energy contained in batteries is an example of chemical energy.

The potential energy associated with a person weighing 78 kg standing at the edge of a diving board 4.0 ft above the water level is _____ kg⋅m2 s2 \frac{\mathrm{kg} \cdot \mathrm{m}^{2}}{\mathrm{~s}^{2}} s2kg⋅m2​ .

The structure of coal is more similar to an aliphatic hydrocarbon structure than an aromatic hydrocarbon.

State Hess's law. How can it be used to calculate the enthalpy change of a reaction that cannot be observed directly?

_____ is a unit used to indicate the caloric content of food.

The magnitude of thermal change of an object depends only on the amount of thermal energy transferred.

A closed system can exchange energy but not matter with its surroundings.

Consider the equation CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O (l) . The ΔH^o_comb of methane is _____ kJ/mol. (Given ΔH^o_f values of methane, carbon dioxide, and water is -74.6, -393.5, and -285.8 kJ/mol respectively)

The potential energy associated with a person weighing 78 kg standing at the edge of a diving board 4.0 ft above the water level is _____ $\frac{\mathrm{kg} \cdot \mathrm{m}^{2}}{\mathrm{~s}^{2}}$ .