Question 1

Which contains more moles of material: 80 grams of helium or 400 grams of argon?

Accepted Answer

A) the helium 
B) the argon 
C) Both contain the same number of moles. 
A) the helium 
B) the argon 
C) Both contain the same number of moles.

Question 2

A 920 g empty iron kettle is put on a stove.How much heat in joules must it absorb to raise its temperature form 15.0ºC to 93.0ºC? (The specific heat for iron is 113 cal/kg · ºC. )

Accepted Answer

A) 33,900 J 
B) 40,500 J 
C) 8110 J 
D) 40,100 J 
A) 33,900 J 
B) 40,500 J 
C) 8110 J 
D) 40,100 J

Question 3

At what temperature would the average thermal speed of oxygen molecules be 13.0 m/s? Oxygen is assumed to approximate an ideal gas.The mass of one O2 molecule is 5.312 × 10-26 kg.

Accepted Answer

A) 0.217 K 
B) 1800 K 
C) 5410 K 
D) 1.31 × 1023 K 
A) 0.217 K 
B) 1800 K 
C) 5410 K 
D) 1.31 × 1023 K

Question 4

In years of heavy snow pack in the mountains it is sometimes desirable to induce early melting of the snow,rather than wait until it all melts suddenly and causes floods.It has been suggested that a way to accomplish this might be to have planes fly over the snow fields and sprinkle them with black soot.What do you think of this idea? Would it work?

Accepted Answer

A) Yes,it would probably work because the black surface would be a better absorber of sunlight than would the white snow. 
B) Yes,it would work because the soot would raise the melting point of the snow. 
C) Yes,it would work because the soot would decrease the specific heat capacity of the snow. 
D) No,it would not work because it is infrared radiation and not visible radiation which melts the snow. 
E) No,it would not work because sunlight has very little effect on how fast the snow melts. 
A) Yes,it would probably work because the black surface would be a better absorber of sunlight than would the white snow. 
B) Yes,it would work because the soot would raise the melting point of the snow. 
C) Yes,it would work because the soot would decrease the specific heat capacity of the snow. 
D) No,it would not work because it is infrared radiation and not visible radiation which melts the snow. 
E) No,it would not work because sunlight has very little effect on how fast the snow melts.

Question 5

A heat conducting rod,0.90 m long,is made of an aluminum section,0.20 m long,and a copper section,0.70 m long.Both sections have a cross-sectional area of 0.0004 m2.The aluminum end and the copper end are maintained at temperatures of 30ºC and 230ºC,respectively.The thermal conductivities of aluminum and copper are 205 and 385 W/m ∙ K,respectively.The temperature of the aluminum-copper junction in the rod,in ºC,is closest to:

Accepted Answer

A) 100 
B) 93 
C) 86 
D) 80 
E) 74 
A) 100 
B) 93 
C) 86 
D) 80 
E) 74

Question 6

A constant-volume gas thermometer is filled with air whose pressure is 104 Pa at the triple point of water.What would the pressure be at 32.0 K?

Accepted Answer

A) 12.2 Pa 
B) 1.13 × 10-3 Pa 
C) 888 Pa 
D) 84.1 Pa 
A) 12.2 Pa 
B) 1.13 × 10-3 Pa 
C) 888 Pa 
D) 84.1 Pa

Question 7

A sealed 29 m3 tank is filled with 9000 moles of ideal oxygen gas (diatomic)at an initial temperature of 270 K.The gas is heated to a final temperature of 330 K.The atomic mass of oxygen is 16.0 g/mol.The initial pressure of the gas,in MPa,is closest to:

Accepted Answer

A) 0.70 
B) 0.79 
C) 0.88 
D) 0.61 
E) 0.51 
A) 0.70 
B) 0.79 
C) 0.88 
D) 0.61 
E) 0.51

Question 8

How many moles of an ideal gas are there in a container with a pressure of 108,893 Pa,a temperature of 321 K,and a volume of 2.0 L? The universal gas constant is 8.314 J/K · mol.

Accepted Answer

A) 0.082 mol 
B) 82 mol 
C) 5600 mol 
D) 11,000 mol 
A) 0.082 mol 
B) 82 mol 
C) 5600 mol 
D) 11,000 mol

Question 9

Shown here is a device that can be used to turn a furnace on or off, depending on the temperature sensed by the device. 
-In the figure,the principle underlying the operation of this device is that

Accepted Answer

A) different metals have different latent heats. 
B) different metals have different thermal conductivities. 
C) different metals have different thermal expansion coefficients. 
D) heat always flows from hot to cold,never from cold to hot. 
E) different metals have different heat capacities. 
A) different metals have different latent heats. 
B) different metals have different thermal conductivities. 
C) different metals have different thermal expansion coefficients. 
D) heat always flows from hot to cold,never from cold to hot. 
E) different metals have different heat capacities.

Question 10

The figure shows 0.0074 mol of gas that undergoes the process 1 → 2 → 3.What is the volume V3?

Accepted Answer

A) 740 cm3 
B) 630 cm3 
C) 510 cm3 
D) 400 cm3 
A) 740 cm3 
B) 630 cm3 
C) 510 cm3 
D) 400 cm3

Question 11

As 771.0 kg copper bar is put into a smelter for melting.The initial temperature of the copper is 300.0 K.How much heat must the smelter produce to completely melt the copper bar? (The specific heat for copper is 386 J/kg · K,the heat of fusion for copper is 205 kJ/kg,and its melting point is 1357 K. )

Accepted Answer

A) 4.73 × 105 kJ 
B) 3.15 × 1011 kJ 
C) 3.15 × 108 kJ 
D) 5.62 × 105 kJ 
A) 4.73 × 105 kJ 
B) 3.15 × 1011 kJ 
C) 3.15 × 108 kJ 
D) 5.62 × 105 kJ

Question 12

If two different gases are at the same temperature,the root mean square speed of their molecules must be the same for both of them.

Accepted Answer

A) True 
 B)False

Question 13

A person consumes a large meal containing 14 kcal.What is the power this meal produces if it is to be "burned off" due to exercise in 6 hours?

Accepted Answer

A) 2.7 W 
B) 9763 W 
C) 0.6 W 
D) 0.0027 W 
A) 2.7 W 
B) 9763 W 
C) 0.6 W 
D) 0.0027 W

Question 14

An ideal gas is held in a container of volume V at pressure P.The rms speed of a gas molecule under these conditions is v.If now the volume and pressure are changed to 2V and 2P,the rms speed of a molecule will be:

Accepted Answer

A) 1/2 v 
B) v 
C) 2v 
D) 4v 
E) v/4 
A) 1/2 v 
B) v 
C) 2v 
D) 4v 
E) v/4

Question 15

If you wanted to know how much the temperature of a particular piece of material would rise when a known amount of heat was added to it,which of the following would be most helpful to know?

Accepted Answer

A) initial temperature 
B) specific heat 
C) density 
D) coefficient of linear expansion 
E) thermal conductivity 
A) initial temperature 
B) specific heat 
C) density 
D) coefficient of linear expansion 
E) thermal conductivity

Question 16

Some properties of glass are listed here.   A glass window pane is 2.7 m high,2.4 m wide and 9 mm thick.The temperature at the inner surface of the glass is 19ºC and at the outer surface 4°C.How much heat is lost each hour through the window?

Accepted Answer

A) 3.1 × 107 J 
B) 3.1 × 104 J 
C) 8.6 × 103 J 
D) 8.6 J 
E) 3.1 × 105 J 
A) 3.1 × 107 J 
B) 3.1 × 104 J 
C) 8.6 × 103 J 
D) 8.6 J 
E) 3.1 × 105 J

Question 17

In an isothermal process,the gas temperature always remains constant and the PV diagram is a hyperbola.

Accepted Answer

A) True 
 B)False

Question 18

1.0 mol of an elemental solid and 1.0 mol of a monatomic gas interact thermally.What is the temperature change of the solid if the gas temperature decreases by 60°C at constant volume?

Accepted Answer

A) 30°C increase 
B) 30°C decrease 
C) 60°C increase 
D) 60°C decrease 
A) 30°C increase 
B) 30°C decrease 
C) 60°C increase 
D) 60°C decrease

Question 19

A 960.0 g iron meteor impacts the earth at a speed of 1268 m/s.If its kinetic energy is entirely converted to heat of the meteorite,what will the resultant temperature rise be? (The specific heat for iron is 113 cal/kg · °C. )

Accepted Answer

A) 1700°C 
B) 1,630,000°C 
C) 1.80°C 
D) 7110°C 
A) 1700°C 
B) 1,630,000°C 
C) 1.80°C 
D) 7110°C

Question 20

The diagrams shows a PV diagram for 4.3 g of oxygen gas in a sealed container.The temperature of state 1 is 21°C.What are the temperatures T3 and T4?

Accepted Answer

A) -52°C and 390°C 
B) 16°C and 47°C 
C) 220°C and 660°C 
D) 11°C and 32°C 
A) -52°C and 390°C 
B) 16°C and 47°C 
C) 220°C and 660°C 
D) 11°C and 32°C

Exam 12: Thermal Properties of Matter

Which contains more moles of material: 80 grams of helium or 400 grams of argon?

A 920 g empty iron kettle is put on a stove.How much heat in joules must it absorb to raise its temperature form 15.0ºC to 93.0ºC? (The specific heat for iron is 113 cal/kg · ºC. )

At what temperature would the average thermal speed of oxygen molecules be 13.0 m/s? Oxygen is assumed to approximate an ideal gas.The mass of one O2 molecule is 5.312 × 10-26 kg.

A constant-volume gas thermometer is filled with air whose pressure is 104 Pa at the triple point of water.What would the pressure be at 32.0 K?

A sealed 29 m3 tank is filled with 9000 moles of ideal oxygen gas (diatomic)at an initial temperature of 270 K.The gas is heated to a final temperature of 330 K.The atomic mass of oxygen is 16.0 g/mol.The initial pressure of the gas,in MPa,is closest to:

How many moles of an ideal gas are there in a container with a pressure of 108,893 Pa,a temperature of 321 K,and a volume of 2.0 L? The universal gas constant is 8.314 J/K · mol.

Shown here is a device that can be used to turn a furnace on or off, depending on the temperature sensed by the device. -In the figure,the principle underlying the operation of this device is that

The figure shows 0.0074 mol of gas that undergoes the process 1 → 2 → 3.What is the volume V3?

If two different gases are at the same temperature,the root mean square speed of their molecules must be the same for both of them.

A person consumes a large meal containing 14 kcal.What is the power this meal produces if it is to be "burned off" due to exercise in 6 hours?

An ideal gas is held in a container of volume V at pressure P.The rms speed of a gas molecule under these conditions is v.If now the volume and pressure are changed to 2V and 2P,the rms speed of a molecule will be:

If you wanted to know how much the temperature of a particular piece of material would rise when a known amount of heat was added to it,which of the following would be most helpful to know?

Some properties of glass are listed here. A glass window pane is 2.7 m high,2.4 m wide and 9 mm thick.The temperature at the inner surface of the glass is 19ºC and at the outer surface 4°C.How much heat is lost each hour through the window?

In an isothermal process,the gas temperature always remains constant and the PV diagram is a hyperbola.

1.0 mol of an elemental solid and 1.0 mol of a monatomic gas interact thermally.What is the temperature change of the solid if the gas temperature decreases by 60°C at constant volume?

A 960.0 g iron meteor impacts the earth at a speed of 1268 m/s.If its kinetic energy is entirely converted to heat of the meteorite,what will the resultant temperature rise be? (The specific heat for iron is 113 cal/kg · °C. )

The diagrams shows a PV diagram for 4.3 g of oxygen gas in a sealed container.The temperature of state 1 is 21°C.What are the temperatures T3 and T4?

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At what temperature would the average thermal speed of oxygen molecules be 13.0 m/s? Oxygen is assumed to approximate an ideal gas.The mass of one O₂ molecule is 5.312 × 10-²⁶ kg.

A sealed 29 m³ tank is filled with 9000 moles of ideal oxygen gas (diatomic)at an initial temperature of 270 K.The gas is heated to a final temperature of 330 K.The atomic mass of oxygen is 16.0 g/mol.The initial pressure of the gas,in MPa,is closest to:

The figure shows 0.0074 mol of gas that undergoes the process 1 → 2 → 3.What is the volume V₃?

The diagrams shows a PV diagram for 4.3 g of oxygen gas in a sealed container.The temperature of state 1 is 21°C.What are the temperatures T₃ and T₄?