Question 1

The pressure in a constant-volume gas thermometer extrapolates to zero at what temperature?

Accepted Answer

A) 0°C 
B) 0 K 
C) 0°F 
D) 0 Pa 
A) 0°C 
B) 0 K 
C) 0°F 
D) 0 Pa

Question 2

The average kinetic energy of a molecule in a monatomic ideal gas is given by:

Accepted Answer

A)    
B)    
C)    
D) none of the these. 
A)    
B)    
C)    
D) none of the these.

Question 3

For an ideal gas of a given mass,if the pressure remains the same and the volume increases,

Accepted Answer

A) the average kinetic energy of the molecules decreases. 
B) the average kinetic energy of the molecules stays the same. 
C) the average kinetic energy of the molecules increases. 
D) Nothing can be determined about the molecular kinetic energy. 
A) the average kinetic energy of the molecules decreases. 
B) the average kinetic energy of the molecules stays the same. 
C) the average kinetic energy of the molecules increases. 
D) Nothing can be determined about the molecular kinetic energy.

Question 4

The internal energy of a monatomic ideal gas is equal to which of the following?

Accepted Answer

A) (3/2)PV 
B) (3/2)nT/V 
C) 3 T/P 
D) none of the above 
A) (3/2)PV 
B) (3/2)nT/V 
C) 3 T/P 
D) none of the above

Question 5

A room has a volume of 50 m3 and is filled with air of an average molecular mass of 29 u.What is the mass of the air in the room at a pressure of 1.0 atm and temperature of 26°C? R = 0.082 L⋅atm/mol⋅K

Accepted Answer

A) 180 kg 
B) 42 kg 
C) 59 kg 
D) 30 kg 
E) 23 kg 
A) 180 kg 
B) 42 kg 
C) 59 kg 
D) 30 kg 
E) 23 kg

Question 6

A brass cube,13.0 cm on a side,is raised in temperature by 239°C.The coefficient of volume expansion of brass is 57 × 10−6/C°.By what percentage is any one of the 13.0-cm edges increased in length?

Accepted Answer

A) 0.34% 
B) 5.9% 
C) 0.45% 
D) 1.8% 
E) 4.3% 
A) 0.34% 
B) 5.9% 
C) 0.45% 
D) 1.8% 
E) 4.3%

Question 7

One mole of an ideal gas at 1.00 atm and 0.00°C occupies 22.4 L.How many molecules of an ideal gas are in one cubic centimeters under these conditions?

Accepted Answer

A) 6.72E+24 
B) 2.24E+4 
C) 2.69E+0 
D) 6.02E+23 
E) 3.72E+20 
A) 6.72E+24 
B) 2.24E+4 
C) 2.69E+0 
D) 6.02E+23 
E) 3.72E+20

Question 8

Suppose the pressure of 20 g of an ideal monatomic gas is tripled while its volume is halved.What happens to the internal energy of the gas?

Accepted Answer

A) It stays the same,as the described changes do not involve internal energy. 
B) It increases. 
C) It decreases. 
D) This depends on the molecular weight of the gas involved,thus this is indeterminate. 
A) It stays the same,as the described changes do not involve internal energy. 
B) It increases. 
C) It decreases. 
D) This depends on the molecular weight of the gas involved,thus this is indeterminate.

Question 9

With volume and molar quantity held constant,by what factor does the absolute temperature change for an ideal gas when the pressure is five times bigger?

Accepted Answer

A) 1/5 
B) 1 
C) 5 
D) 25 
A) 1/5 
B) 1 
C) 5 
D) 25

Question 10

A steel sphere sits on top of an aluminum ring.The steel sphere (α = 1.10 × 10−5/C°)has a diameter of 8 000 cm at 0°C.The aluminum ring (α = 2.40 × 10−5/C°)has an inside diameter of 7 991 cm at 0°C.Closest to which temperature given will the sphere just fall through the ring?

Accepted Answer

A) 47°C 
B) 102°C 
C) 87°C 
D) 108°C 
E) 65°C 
A) 47°C 
B) 102°C 
C) 87°C 
D) 108°C 
E) 65°C

Question 11

A pipe of length 10.0 m increases in length by 1.5 cm when its temperature is increased by 72°F.What is its coefficient of linear expansion?

Accepted Answer

A) 38 × 10−6/°C 
B) 75 × 10−6/°C 
C) 68 × 10−6/°C 
D) 28 × 10−6/°C 
E) 47 × 10−6/°C 
A) 38 × 10−6/°C 
B) 75 × 10−6/°C 
C) 68 × 10−6/°C 
D) 28 × 10−6/°C 
E) 47 × 10−6/°C

Question 12

Boltzmann's constant,kB,may be derived as a function of R,the universal gas constant,and NA,Avogadro's number.Which expresses the value of kB?

Accepted Answer

A) NAR2 
B) NAR 
C) R/NA 
D) NA/R 
A) NAR2 
B) NAR 
C) R/NA 
D) NA/R

Question 13

For a quantity of ideal gas,which of the following is constant?

Accepted Answer

A) PTV 
B) P/TV 
C) PT/V 
D) PV/T 
A) PTV 
B) P/TV 
C) PT/V 
D) PV/T

Question 14

Two one-liter containers each contain 10 moles of a gas.The temperature is the same in both containers.Container A holds helium (molecular mass = 4 u),and Container B holds oxygen (molecular mass = 16 u).Which container has the higher pressure and by what factor?

Accepted Answer

A) Container A has 4 times the pressure of Container B. 
B) Container A has 2 times the pressure of Container B. 
C) Both containers have the same pressure. 
D) More information is needed to answer this question. 
A) Container A has 4 times the pressure of Container B. 
B) Container A has 2 times the pressure of Container B. 
C) Both containers have the same pressure. 
D) More information is needed to answer this question.

Question 15

Normal body temperature for humans is 37°C.What is this temperature in kelvins?

Accepted Answer

A) 296 
B) 310 
C) 393 
D) 273 
A) 296 
B) 310 
C) 393 
D) 273

Question 16

A temperature of 100 K equals which of the following?

Accepted Answer

A) 373°C 
B) 173°C 
C) -279°F 
D) 279°F 
E) ​-639°F 
A) 373°C 
B) 173°C 
C) -279°F 
D) 279°F 
E) ​-639°F

Question 17

If the temperature of a volume of ideal gas increases for 100°C to 200°C,what happens to the average kinetic energy of the molecules?

Accepted Answer

A) It halves. 
B) It doubles. 
C) It increases but less that double. 
D) It increases more than double. 
A) It halves. 
B) It doubles. 
C) It increases but less that double. 
D) It increases more than double.

Question 18

What happens to its moment of inertia when a steel disk is heated?

Accepted Answer

A) It increases. 
B) It decreases. 
C) It stays the same. 
D) It increases for half the temperature increase and then decreases for the rest of the temperature increase. 
A) It increases. 
B) It decreases. 
C) It stays the same. 
D) It increases for half the temperature increase and then decreases for the rest of the temperature increase.

Question 19

If it is given that 635 K equals 362°C,then it follows that 902 K equals​

Accepted Answer

A) 629°C. 
B) 1 175°C. 
C) ​514°C. 
D) ​650°C. 
E) ​640°C. 
A) 629°C. 
B) 1 175°C. 
C) ​514°C. 
D) ​650°C. 
E) ​640°C.

Exam 10: Thermal Physics

The pressure in a constant-volume gas thermometer extrapolates to zero at what temperature?

The average kinetic energy of a molecule in a monatomic ideal gas is given by:

For an ideal gas of a given mass,if the pressure remains the same and the volume increases,

The internal energy of a monatomic ideal gas is equal to which of the following?

A room has a volume of 50 m3 and is filled with air of an average molecular mass of 29 u.What is the mass of the air in the room at a pressure of 1.0 atm and temperature of 26°C? R = 0.082 L⋅atm/mol⋅K

A brass cube,13.0 cm on a side,is raised in temperature by 239°C.The coefficient of volume expansion of brass is 57 × 10−6/C°.By what percentage is any one of the 13.0-cm edges increased in length?

One mole of an ideal gas at 1.00 atm and 0.00°C occupies 22.4 L.How many molecules of an ideal gas are in one cubic centimeters under these conditions?

Suppose the pressure of 20 g of an ideal monatomic gas is tripled while its volume is halved.What happens to the internal energy of the gas?

With volume and molar quantity held constant,by what factor does the absolute temperature change for an ideal gas when the pressure is five times bigger?

A steel sphere sits on top of an aluminum ring.The steel sphere (α = 1.10 × 10−5/C°)has a diameter of 8 000 cm at 0°C.The aluminum ring (α = 2.40 × 10−5/C°)has an inside diameter of 7 991 cm at 0°C.Closest to which temperature given will the sphere just fall through the ring?

A pipe of length 10.0 m increases in length by 1.5 cm when its temperature is increased by 72°F.What is its coefficient of linear expansion?

Boltzmann's constant,kB,may be derived as a function of R,the universal gas constant,and NA,Avogadro's number.Which expresses the value of kB?

For a quantity of ideal gas,which of the following is constant?

Two one-liter containers each contain 10 moles of a gas.The temperature is the same in both containers.Container A holds helium (molecular mass = 4 u),and Container B holds oxygen (molecular mass = 16 u).Which container has the higher pressure and by what factor?

Normal body temperature for humans is 37°C.What is this temperature in kelvins?

A temperature of 100 K equals which of the following?

If the temperature of a volume of ideal gas increases for 100°C to 200°C,what happens to the average kinetic energy of the molecules?

What happens to its moment of inertia when a steel disk is heated?

If it is given that 635 K equals 362°C,then it follows that 902 K equals​

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A room has a volume of 50 m³ and is filled with air of an average molecular mass of 29 u.What is the mass of the air in the room at a pressure of 1.0 atm and temperature of 26°C? R = 0.082 L⋅atm/mol⋅K

A brass cube,13.0 cm on a side,is raised in temperature by 239°C.The coefficient of volume expansion of brass is 57 × 10−⁶/C°.By what percentage is any one of the 13.0-cm edges increased in length?

A steel sphere sits on top of an aluminum ring.The steel sphere (α = 1.10 × 10−⁵/C°)has a diameter of 8 000 cm at 0°C.The aluminum ring (α = 2.40 × 10−⁵/C°)has an inside diameter of 7 991 cm at 0°C.Closest to which temperature given will the sphere just fall through the ring?

Boltzmann's constant,k_B,may be derived as a function of R,the universal gas constant,and N_A,Avogadro's number.Which expresses the value of k_B?

If it is given that 635 K equals 362°C,then it follows that 902 K equals