Question 1

The entropy of a system is a measure of its

Accepted Answer

A) temperature. 
B) heat content. 
C) density. 
D) disorder.

Question 2

Heat conduction is least efficient in

Accepted Answer

A) metals. 
B) nonmetallic solids. 
C) water. 
D) gases.

Question 3

A refrigerator

Accepted Answer

A) produces cold. 
B) changes heat to cold. 
C) causes heat to disappear. 
D) removes heat from a region and carries it elsewhere.

Question 4

The specific heat of water is 4.2 kJ/kg.$\circ$C.How long will it take for a 2-kW heating element to raise the temperature of 30 kg of water from 20$\circ$C to 80$\circ$C?

Accepted Answer

A) 6.3 min 
B) 15 min 
C) 63 min 
D) 84 min

Question 5

The pressure at the bottom of a barrel filled with liquid does not depend on the

Accepted Answer

A) acceleration of gravity. 
B) liquid density. 
C) height of the liquid. 
D) area of the liquid surface.

Question 6

In an isolated system, entropy

Accepted Answer

A) cannot decrease. 
B) must remain constant. 
C) cannot increase. 
D) may increase, decrease, or remain constant.

Question 7

The work output of every heat engine

Accepted Answer

A) equals its heat intake. 
B) equals the difference between its heat intake and heat exhaust. 
C) depends only on its intake temperature. 
D) depends only on its exhaust temperature.

Question 8

The specific heat of water is 4.2 kJ/kg.$\circ$C.When 400 kJ of heat is added to 12 kg of water at 2$\circ$C, its final temperature is

Accepted Answer

A) 5.9$\circ$C. 
B) 7.9$\circ$C. 
C) 11.7$\circ$C. 
D) 17.9$\circ$C.

Question 9

Of these substances, the one with the lowest specific heat is

Accepted Answer

A) water. 
B) ice. 
C) concrete. 
D) gold.

Question 10

When heat is added to a body of matter, the resulting temperature increase does not depend upon

Accepted Answer

A) its mass. 
B) its shape. 
C) what kind of material it consists of. 
D) whether it is in the solid, liquid, or gaseous state.

Question 11

Which of the following formulas relating temperatures on the Celsius and Fahrenheit scales is correct?

Accepted Answer

A) Tc = (5/9)(TF - 32$\circ$) 
B) Tc = (5/9)(TF + 32$\circ$) 
C) Tc = (9/5)(TF - 32$\circ$) 
D) Tc = (9/5)(TF + 32$\circ$)

Question 12

A 2-kg brick has the dimensions 7.5 cm * 15 cm * 30 cm.The pressure the brick exerts when standing on its smallest face is

Accepted Answer

A) 0.0178 Pa. 
B) 0.0225 Pa. 
C) 178 Pa. 
D) 225 Pa.

Question 13

Which of the following quantities is independent of the size and shape of an object composed of a given material?

Accepted Answer

A) volume 
B) mass 
C) weight 
D) density

Question 14

Heat can be transferred through a gas by which one or more of the following?

Accepted Answer

A) conduction 
B) convection 
C) radiation 
D) condensation 
E) Both A, B, and C

Question 15

A Celsius thermometer and an absolute thermometer are used to measure the temperature of the same gas sample.The readings on the thermometers are respectively TC and TK.Which is correct?

Accepted Answer

A) TC is smaller than TK. 
B) TC is larger than TK. 
C) TC is equal to TK. 
D) Any of these choices could be correct, depending on the gas temperature.

Question 16

The properties of several different materials are being compared.If the samples all have the same volume, the one with the greatest mass also has the greatest

Accepted Answer

A) density. 
B) buoyancy. 
C) pressure. 
D) temperature.

Question 17

A container holds 1 g of air at atmospheric pressure.When an additional gram of air is pumped into the container and there is no change in temperature, the new pressure is

Accepted Answer

A) 0.5 atm. 
B) 1 atm. 
C) 2 atm. 
D) 4 atm.

Question 18

Of the following, a molecule is best described as

Accepted Answer

A) any very tiny particle. 
B) the smallest particle found in nature. 
C) the smallest particle of a substance that is representative of the substance. 
D) the ultimate particle of which all matter is composed.

Question 19

The density of air is 1.3 kg/m3.The air in a room 5 m long, 4 m wide, and 2.5 m high has a mass of

Accepted Answer

A) 0.26 kg. 
B) 6.5 kg. 
C) 38 kg. 
D) 65 kg.

Question 20

The maximum possible efficiency of a heat engine

Accepted Answer

A) is 100%. 
B) depends on the intake temperature. 
C) depends on the difference between the exhaust and intake temperatures. 
D) depends on the ratio between the exhaust and intake temperatures.

Exam 5: Matter and Heat

The entropy of a system is a measure of its

Heat conduction is least efficient in

A refrigerator

The specific heat of water is 4.2 kJ/kg.^$\circ$C.How long will it take for a 2-kW heating element to raise the temperature of 30 kg of water from 20^$\circ$C to 80^$\circ$C?

The pressure at the bottom of a barrel filled with liquid does not depend on the

In an isolated system, entropy

The work output of every heat engine

The specific heat of water is 4.2 kJ/kg.^$\circ$C.When 400 kJ of heat is added to 12 kg of water at 2^$\circ$C, its final temperature is

Of these substances, the one with the lowest specific heat is

When heat is added to a body of matter, the resulting temperature increase does not depend upon

Which of the following formulas relating temperatures on the Celsius and Fahrenheit scales is correct?

A 2-kg brick has the dimensions 7.5 cm * 15 cm * 30 cm.The pressure the brick exerts when standing on its smallest face is

Which of the following quantities is independent of the size and shape of an object composed of a given material?

Heat can be transferred through a gas by which one or more of the following?

A Celsius thermometer and an absolute thermometer are used to measure the temperature of the same gas sample.The readings on the thermometers are respectively T_C and T_K.Which is correct?

The properties of several different materials are being compared.If the samples all have the same volume, the one with the greatest mass also has the greatest

A container holds 1 g of air at atmospheric pressure.When an additional gram of air is pumped into the container and there is no change in temperature, the new pressure is

Of the following, a molecule is best described as

The density of air is 1.3 kg/m³.The air in a room 5 m long, 4 m wide, and 2.5 m high has a mass of

The maximum possible efficiency of a heat engine

Exam 5: Matter and Heat

The entropy of a system is a measure of its

Heat conduction is least efficient in

A refrigerator

The specific heat of water is 4.2 kJ/kg. ∘\circ∘ C.How long will it take for a 2-kW heating element to raise the temperature of 30 kg of water from 20 ∘\circ∘ C to 80 ∘\circ∘ C?

The pressure at the bottom of a barrel filled with liquid does not depend on the

In an isolated system, entropy

The work output of every heat engine

The specific heat of water is 4.2 kJ/kg. ∘\circ∘ C.When 400 kJ of heat is added to 12 kg of water at 2 ∘\circ∘ C, its final temperature is

Of these substances, the one with the lowest specific heat is

When heat is added to a body of matter, the resulting temperature increase does not depend upon

Which of the following formulas relating temperatures on the Celsius and Fahrenheit scales is correct?

A 2-kg brick has the dimensions 7.5 cm * 15 cm * 30 cm.The pressure the brick exerts when standing on its smallest face is

Which of the following quantities is independent of the size and shape of an object composed of a given material?

Heat can be transferred through a gas by which one or more of the following?

A Celsius thermometer and an absolute thermometer are used to measure the temperature of the same gas sample.The readings on the thermometers are respectively TC and TK.Which is correct?

The properties of several different materials are being compared.If the samples all have the same volume, the one with the greatest mass also has the greatest

A container holds 1 g of air at atmospheric pressure.When an additional gram of air is pumped into the container and there is no change in temperature, the new pressure is

Of the following, a molecule is best described as

The density of air is 1.3 kg/m3.The air in a room 5 m long, 4 m wide, and 2.5 m high has a mass of

The maximum possible efficiency of a heat engine

The specific heat of water is 4.2 kJ/kg.^$\circ$C.How long will it take for a 2-kW heating element to raise the temperature of 30 kg of water from 20^$\circ$C to 80^$\circ$C?

The specific heat of water is 4.2 kJ/kg.^$\circ$C.When 400 kJ of heat is added to 12 kg of water at 2^$\circ$C, its final temperature is

A Celsius thermometer and an absolute thermometer are used to measure the temperature of the same gas sample.The readings on the thermometers are respectively T_C and T_K.Which is correct?

The density of air is 1.3 kg/m³.The air in a room 5 m long, 4 m wide, and 2.5 m high has a mass of