Question 1

A temperature of 20$\degree$C is the same as

Accepted Answer

A)  -20.9$\degree$F. 
B)  -6.4$\degree$F. 
C)  68$\degree$F. 
D)  94$\degree$F. 
A)  -20.9$\degree$F. 
B)  -6.4$\degree$F. 
C)  68$\degree$F. 
D)  94$\degree$F.

Question 2

The temperature of a gas sample in a rigid container is reduced. The pressure the gas exerts on the container walls decreases because

Accepted Answer

A)  its molecules are in contact with the walls for briefer intervals. 
B)  its molecular masses decrease. 
C)  its molecules have lower average speeds and so strike the walls less often with less momentum. 
D)  its molecules lose less energy each time they strike the walls. 
A)  its molecules are in contact with the walls for briefer intervals. 
B)  its molecular masses decrease. 
C)  its molecules have lower average speeds and so strike the walls less often with less momentum. 
D)  its molecules lose less energy each time they strike the walls.

Question 3

The specific heat of water is 4.2 kJ/kg$\degree$C. The heat needed to warm 8 kg of water from 20$\degree$C to 70$\degree$C is

Accepted Answer

A)  400 kJ. 
B)  420 kJ. 
C)  1680 kJ. 
D)  2016 kJ. 
A)  400 kJ. 
B)  420 kJ. 
C)  1680 kJ. 
D)  2016 kJ.

Question 4

In an isolated system, entropy

Accepted Answer

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

Question 5

The pressure on 100 liters of helium is increased from 100 kPa to 400 kPa. The new volume of the helium is

Accepted Answer

A)  25 liters. 
B)  50 liters. 
C)  400 liters. 
D)  1600 liters. 
A)  25 liters. 
B)  50 liters. 
C)  400 liters. 
D)  1600 liters.

Question 6

Which of the following formulas expresses the relationship between the pressure and absolute temperature of a gas sample whose volume is fixed?

Accepted Answer

A)    
B)    
C)    
D) 
  
A)    
B)    
C)    
D)

Question 7

In order to operate, a heat engine must have

Accepted Answer

A)  either a hot or a cold reservoir. 
B)  both a hot and a cold reservoir. 
C)  a boiler. 
D)  a supply of fuel that can be burned, such as coal or oil. 
A)  either a hot or a cold reservoir. 
B)  both a hot and a cold reservoir. 
C)  a boiler. 
D)  a supply of fuel that can be burned, such as coal or oil.

Question 8

When a liquid freezes to become a solid,

Accepted Answer

A)  its temperature rises. 
B)  its temperature falls. 
C)  it absorbs heat. 
D)  it gives off heat. 
A)  its temperature rises. 
B)  its temperature falls. 
C)  it absorbs heat. 
D)  it gives off heat.

Question 9

A barometer measures

Accepted Answer

A)  atmospheric density. 
B)  atmospheric pressure. 
C)  water density. 
D)  water pressure. 
A)  atmospheric density. 
B)  atmospheric pressure. 
C)  water density. 
D)  water pressure.

Question 10

The density of brass is 8 $\times$ 103 kg/m3. The volume occupied by 320 g of brass is

Accepted Answer

A)  0.038 cm3. 
B)  3.2 cm3. 
C)  38 cm3. 
D)  380 cm3. 
A)  0.038 cm3. 
B)  3.2 cm3. 
C)  38 cm3. 
D)  380 cm3.

Question 11

Molecules are, in general, farthest apart from one another in

Accepted Answer

A)  gases. 
B)  liquids. 
C)  crystalline solids. 
D)  amorphous solids. 
A)  gases. 
B)  liquids. 
C)  crystalline solids. 
D)  amorphous solids.

Question 12

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

Accepted Answer

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

Question 13

A sample of a gas is expanded to twice its original volume while its temperature is held constant. Relative to their original average energy, the new average energy of the molecules is

Accepted Answer

A)  half as great. 
B)  the same. 
C)  twice as great. 
D)  four times as great. 
A)  half as great. 
B)  the same. 
C)  twice as great. 
D)  four times as great.

Question 14

Sublimation refers to

Accepted Answer

A)  the vaporization of a solid without first becoming a liquid. 
B)  the melting of a solid. 
C)  the vaporization of a liquid. 
D)  the condensation of a gas into a liquid. 
A)  the vaporization of a solid without first becoming a liquid. 
B)  the melting of a solid. 
C)  the vaporization of a liquid. 
D)  the condensation of a gas into a liquid.

Question 15

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. 
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 16

Ethanol boils at 172$\degree$F. The Celsius equivalent of this temperature is

Accepted Answer

A)  64$\degree$C. 
B)  78$\degree$C. 
C)  140$\degree$C. 
D)  278$\degree$C. 
A)  64$\degree$C. 
B)  78$\degree$C. 
C)  140$\degree$C. 
D)  278$\degree$C.

Question 17

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 of these statements 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. 
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 18

The first law of thermodynamics is the same as the

Accepted Answer

A)  second law of thermodynamics. 
B)  law of conservation of energy. 
C)  law of conservation of momentum. 
D)  first law of motion. 
A)  second law of thermodynamics. 
B)  law of conservation of energy. 
C)  law of conservation of momentum. 
D)  first law of motion.

Question 19

The melting point of water is 0$\degree$C. Its freezing point is

Accepted Answer

A)  slightly less than 0$\degree$C. 
B)  0$\degree$C. 
C)  slightly more than 0$\degree$C. 
D)  32$\degree$C. 
A)  slightly less than 0$\degree$C. 
B)  0$\degree$C. 
C)  slightly more than 0$\degree$C. 
D)  32$\degree$C.

Question 20

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

Accepted Answer

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

A temperature of 20 $\degree$ C is the same as

The temperature of a gas sample in a rigid container is reduced. The pressure the gas exerts on the container walls decreases because

The specific heat of water is 4.2 kJ/kg $\degree$ C. The heat needed to warm 8 kg of water from 20 $\degree$ C to 70 $\degree$ C is

In an isolated system, entropy

The pressure on 100 liters of helium is increased from 100 kPa to 400 kPa. The new volume of the helium is

Which of the following formulas expresses the relationship between the pressure and absolute temperature of a gas sample whose volume is fixed?

In order to operate, a heat engine must have

When a liquid freezes to become a solid,

A barometer measures

The density of brass is 8 $\times$ 10³ kg/m³. The volume occupied by 320 g of brass is

Molecules are, in general, farthest apart from one another in

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

A sample of a gas is expanded to twice its original volume while its temperature is held constant. Relative to their original average energy, the new average energy of the molecules is

Sublimation refers to

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

Ethanol boils at 172 $\degree$ F. The Celsius equivalent of this 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 of these statements is correct?

The first law of thermodynamics is the same as the

The melting point of water is 0 $\degree$ C. Its freezing point is

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

The Scientific Method

Motion

Energy

Energy and the Future

Electricity and Magnetism

Waves

The Nucleus

The Atom

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

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Exam 5: Matter and Heat

A temperature of 20 °\degree° C is the same as

The temperature of a gas sample in a rigid container is reduced. The pressure the gas exerts on the container walls decreases because

The specific heat of water is 4.2 kJ/kg °\degree° C. The heat needed to warm 8 kg of water from 20 °\degree° C to 70 °\degree° C is

In an isolated system, entropy

The pressure on 100 liters of helium is increased from 100 kPa to 400 kPa. The new volume of the helium is

Which of the following formulas expresses the relationship between the pressure and absolute temperature of a gas sample whose volume is fixed?

In order to operate, a heat engine must have

When a liquid freezes to become a solid,

A barometer measures

The density of brass is 8 ×\times× 103 kg/m3. The volume occupied by 320 g of brass is

Molecules are, in general, farthest apart from one another in

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

A sample of a gas is expanded to twice its original volume while its temperature is held constant. Relative to their original average energy, the new average energy of the molecules is

Sublimation refers to

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

Ethanol boils at 172 °\degree° F. The Celsius equivalent of this 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 TC and TK. Which of these statements is correct?

The first law of thermodynamics is the same as the

The melting point of water is 0 °\degree° C. Its freezing point is

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

The Scientific Method

Motion

Energy

Energy and the Future

Electricity and Magnetism

Waves

The Nucleus

The Atom

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

The Universe Galaxies

Filters

A temperature of 20 $\degree$ C is the same as

The specific heat of water is 4.2 kJ/kg $\degree$ C. The heat needed to warm 8 kg of water from 20 $\degree$ C to 70 $\degree$ C is

The density of brass is 8 $\times$ 10³ kg/m³. The volume occupied by 320 g of brass is

Ethanol boils at 172 $\degree$ F. The Celsius equivalent of this 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 of these statements is correct?

The melting point of water is 0 $\degree$ C. Its freezing point is