Question 1

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 D

Question 2

What thermodynamic quantity is held constant in Boyle's law?

Accepted Answer

A)  pressure 
B)  volume 
C)  temperature 
D)  Both pressure and volume are each held constant. 
A)  pressure 
B)  volume 
C)  temperature 
D)  Both pressure and volume are each held constant. C

Question 3

For a monatomic gas,3R/2 is

Accepted Answer

A)  the specific heat per mole at constant volume. 
B)  the specific heat per unit mass at constant volume. 
C)  NAkB. 
D)  none of the above. 
A)  the specific heat per mole at constant volume. 
B)  the specific heat per unit mass at constant volume. 
C)  NAkB. 
D)  none of the above. A

Question 4

A tank with a volume of 0.200 m3 contains 27.0°C helium gas at a pressure of 63.5 atm.How many balloons can be blown up if each filled balloon is a sphere 30.0 cm in diameter at 27.0°C and absolute pressure of 1.20 atm? Assume all the helium is transferred to the balloons.

Accepted Answer

A)  1180 balloons 
B)  884 balloons 
C)  749 balloons 
D)  375 balloons 
A)  1180 balloons 
B)  884 balloons 
C)  749 balloons 
D)  375 balloons

Question 5

The volume holding 0.63 mole of an ideal gas is compressed to 1/4 of its original volume by a piston.At the same time the pressure of the gas triples.If the original absolute temperature of the gas was T,that is the new temperature after compression?

Accepted Answer

A)  4/3T 
B)  3/4T 
C)  0.63(3/4T) 
D)  0.63(4/3T) 
A)  4/3T 
B)  3/4T 
C)  0.63(3/4T) 
D)  0.63(4/3T)

Question 6

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 7

What is the mass of a mole of oxygen gas?

Accepted Answer

A)  8.0 g 
B)  16 g 
C)  24 g 
D)  32 g 
A)  8.0 g 
B)  16 g 
C)  24 g 
D)  32 g

Question 8

An ideal gas is confined to a container with adjustable volume.The number of moles and temperature are constant.By what factor will the volume change if pressure quadruples?

Accepted Answer

A)  16 
B)  4 
C)  1/4 
D)  1/16 
A)  16 
B)  4 
C)  1/4 
D)  1/16

Question 9

A quantity of a monatomic ideal gas expands to four times the volume while maintaining the same pressure.If the internal energy of the gas were U0 before the expansion,what is it after the expansion?

Accepted Answer

A)  U0 
B)  2U0 
C)  4U0 
D)  The change in temperature must also be known to answer this question. 
A)  U0 
B)  2U0 
C)  4U0 
D)  The change in temperature must also be known to answer this question.

Question 10

How many moles of air must escape from a 10 m × 8.0 m × 5.0 m room when the temperature is raised from 0°C to 10°C? Assume the pressure remains unchanged at one atmosphere while the room is heated.

Accepted Answer

A)  1.3 × 103 moles 
B)  1.2 × 103 moles 
C)  6.5 × 102 moles 
D)  3.7 × 102 moles 
A)  1.3 × 103 moles 
B)  1.2 × 103 moles 
C)  6.5 × 102 moles 
D)  3.7 × 102 moles

Question 11

The gas,C3H8,is used in outside grills,and several moles of this gas will burn during an afternoon's grilling.What is the mass of one molecule of this gas?

Accepted Answer

A)  4.4 × 10-23 g 
B)  7.3 × 10-23 kg 
C)  7.3 × 10-26 kg 
D)  8.8 × 10-26 kg 
A)  4.4 × 10-23 g 
B)  7.3 × 10-23 kg 
C)  7.3 × 10-26 kg 
D)  8.8 × 10-26 kg

Question 12

Four moles of nitrogen gas are contained in an enclosed cylinder with a movable piston.If the gas temperature is 298 K,and the pressure is 1.01 × 106 N/m2,what is the volume? (R = 8.31 J/mol·K)

Accepted Answer

A)  9.81 × 10−3 m3 
B)  4.90 × 10−3 m3 
C)  17.3 × 10−3 m3 
D)  8.31 × 10−3 m3 
A)  9.81 × 10−3 m3 
B)  4.90 × 10−3 m3 
C)  17.3 × 10−3 m3 
D)  8.31 × 10−3 m3

Question 13

Two moles of an ideal gas at 3.0 atm and 10°C are heated up to 100°C.If the volume is held constant during this heating,what is the final pressure?

Accepted Answer

A)  4.5 atm 
B)  4.0 atm 
C)  0.14 atm 
D)  1.0 atm 
A)  4.5 atm 
B)  4.0 atm 
C)  0.14 atm 
D)  1.0 atm

Question 14

A helium-filled weather balloon has a 0.90-m radius at liftoff where air pressure is 1.0 atm and the temperature is 298 K.When airborne,the temperature is 210 K,and its radius expands to 3.5 m.What is the pressure at the airborne location?

Accepted Answer

A)  0.50 atm 
B)  0.012 atm 
C)  0.019 atm 
D)  0.38 atm 
A)  0.50 atm 
B)  0.012 atm 
C)  0.019 atm 
D)  0.38 atm

Question 15

Suppose there are 2 moles of a gas in a container of fixed size and the average spacing of molecules in the container is 4.0 nm.If an additional 14 moles of the gas are added to the container and thermal equilibrium is established,what is the new average spacing of the molecules?

Accepted Answer

A)  2.0 nm 
B)  0.50 nm 
C)  1.4 nm 
D)  2.8 nm 
A)  2.0 nm 
B)  0.50 nm 
C)  1.4 nm 
D)  2.8 nm

Question 16

How many atoms are present in a sample of pure iron with a mass of 210 g? (The atomic mass of iron = 56 u and NA = 6.02 × 1023. )

Accepted Answer

A)  1.8 × 1019 
B)  2.3 × 1028 
C)  2.3 × 1024 
D)  3.2 × 1028 
A)  1.8 × 1019 
B)  2.3 × 1028 
C)  2.3 × 1024 
D)  3.2 × 1028

Question 17

What is the mass of 2 moles of carbon dioxide?

Accepted Answer

A)  88 g 
B)  80 g 
C)  64 g 
D)  56 g 
A)  88 g 
B)  80 g 
C)  64 g 
D)  56 g

Question 18

A storeroom has a volume of 30 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 22°C? R = 0.082 L · atm/mol · K

Accepted Answer

A)  36 kg 
B)  1240 kg 
C)  72 kg 
D)  700 kg 
A)  36 kg 
B)  1240 kg 
C)  72 kg 
D)  700 kg

Question 19

If the temperature of a gas triples,by what factor does the speed of a molecule with the average kinetic energy change?

Accepted Answer

A)  It increases by a factor of 3. 
B)  It increases by a factor of
  . 
C)  It increases by a factor of 3
  . 
D)  It increases by a factor of 1/3. 
A)  It increases by a factor of 3. 
B)  It increases by a factor of
  . 
C)  It increases by a factor of 3
  . 
D)  It increases by a factor of 1/3.

Question 20

How many molecules are there in 14 grams of nitrogen gas?

Accepted Answer

A)  NA/2 
B)  NA 
C)  2 NA 
D)  The answer is not given. 
A)  NA/2 
B)  NA 
C)  2 NA 
D)  The answer is not given.

Exam 15: Electric Forces and Electric Fields: Part A

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

What thermodynamic quantity is held constant in Boyle's law?

For a monatomic gas,3R/2 is

A tank with a volume of 0.200 m3 contains 27.0°C helium gas at a pressure of 63.5 atm.How many balloons can be blown up if each filled balloon is a sphere 30.0 cm in diameter at 27.0°C and absolute pressure of 1.20 atm? Assume all the helium is transferred to the balloons.

The volume holding 0.63 mole of an ideal gas is compressed to 1/4 of its original volume by a piston.At the same time the pressure of the gas triples.If the original absolute temperature of the gas was T,that is the new temperature after compression?

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

What is the mass of a mole of oxygen gas?

An ideal gas is confined to a container with adjustable volume.The number of moles and temperature are constant.By what factor will the volume change if pressure quadruples?

A quantity of a monatomic ideal gas expands to four times the volume while maintaining the same pressure.If the internal energy of the gas were U0 before the expansion,what is it after the expansion?

How many moles of air must escape from a 10 m × 8.0 m × 5.0 m room when the temperature is raised from 0°C to 10°C? Assume the pressure remains unchanged at one atmosphere while the room is heated.

The gas,C3H8,is used in outside grills,and several moles of this gas will burn during an afternoon's grilling.What is the mass of one molecule of this gas?

Four moles of nitrogen gas are contained in an enclosed cylinder with a movable piston.If the gas temperature is 298 K,and the pressure is 1.01 × 106 N/m2,what is the volume? (R = 8.31 J/mol·K)

Two moles of an ideal gas at 3.0 atm and 10°C are heated up to 100°C.If the volume is held constant during this heating,what is the final pressure?

A helium-filled weather balloon has a 0.90-m radius at liftoff where air pressure is 1.0 atm and the temperature is 298 K.When airborne,the temperature is 210 K,and its radius expands to 3.5 m.What is the pressure at the airborne location?

Suppose there are 2 moles of a gas in a container of fixed size and the average spacing of molecules in the container is 4.0 nm.If an additional 14 moles of the gas are added to the container and thermal equilibrium is established,what is the new average spacing of the molecules?

How many atoms are present in a sample of pure iron with a mass of 210 g? (The atomic mass of iron = 56 u and NA = 6.02 × 1023. )

What is the mass of 2 moles of carbon dioxide?

A storeroom has a volume of 30 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 22°C? R = 0.082 L · atm/mol · K

If the temperature of a gas triples,by what factor does the speed of a molecule with the average kinetic energy change?

How many molecules are there in 14 grams of nitrogen gas?

Introduction

Introduction: Part A

Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

Vectors and Two-Dimensional Motion: Part A

The Laws of Motion

The Laws of Motion: Part A

Energy

Energy: Part A

Momentum and Collisions

Momentum and Collisions: Part A

Rotational Motion and the Law of Gravity

Rotational Motion and the Law of Gravity: Part A

Rotational Equilibrium and Rotational Dynamics

Rotational Equilibrium and Rotational Dynamics: Part A

Solids and Fluids

Solids and Fluids: Part A

Thermal Physics

Thermal Physics: Part A

Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

The Laws of Thermodynamics Work in Thermodynamic Processes

The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

Vibrations and Waves

Vibrations and Waves: Part A

Sound

Sound: Part A

Electric Forces and Electric Fields

Electrical Energy and Capacitance

Electrical Energy and Capacitance: Part A

Current and Resistance Electric Current

Current and Resistance Electric Current: Part A

Direct-Current Circuits Sources of EMF

Direct-Current Circuits Sources of EMF: Part A

Magnetism Magnets

Magnetism Magnets: Part A

Induced Voltages and Inductance

Induced Voltages and Inductance: Part A

Alternating-Current Circuits and Electromagnetic Waves

Alternating-Current Circuits and Electromagnetic Waves: Part A

Reflection and Refraction of Light

Reflection and Refraction of Light: Part A

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics

Wave Optics: Part A

Optical Instruments

Optical Instruments: Part A

Relativity

Relativity: Part A

Quantum Physics Blackbody Radiation and Plancks Hypothesis

Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

Atomic Physics

Atomic Physics: Part A

Nuclear Physics

Nuclear Physics: Part A

Nuclear Energy and Elementary Particles

Nuclear Energy and Elementary Particles: Part A

A tank with a volume of 0.200 m³ contains 27.0°C helium gas at a pressure of 63.5 atm.How many balloons can be blown up if each filled balloon is a sphere 30.0 cm in diameter at 27.0°C and absolute pressure of 1.20 atm? Assume all the helium is transferred to the balloons.

A quantity of a monatomic ideal gas expands to four times the volume while maintaining the same pressure.If the internal energy of the gas were U₀ before the expansion,what is it after the expansion?

The gas,C₃H₈,is used in outside grills,and several moles of this gas will burn during an afternoon's grilling.What is the mass of one molecule of this gas?

Four moles of nitrogen gas are contained in an enclosed cylinder with a movable piston.If the gas temperature is 298 K,and the pressure is 1.01 × 10⁶ N/m²,what is the volume? (R = 8.31 J/mol·K)

How many atoms are present in a sample of pure iron with a mass of 210 g? (The atomic mass of iron = 56 u and N_A = 6.02 × 10²³. )

A storeroom has a volume of 30 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 22°C? R = 0.082 L · atm/mol · K