Question 1

If the average kinetic energy of the molecules of a monatomic ideal gas at 60°C is doubled,what is the resulting temperature of the gas?

Accepted Answer

A)  It becomes 60×
  °C. 
B)  It becomes 666°C. 
C)  It becomes 120°C. 
D)  It becomes 393°C. 
A)  It becomes 60×
  °C. 
B)  It becomes 666°C. 
C)  It becomes 120°C. 
D)  It becomes 393°C.

Question 2

A spherical air bubble originating from a scuba diver at a depth of 30.0 m has a diameter of 1.0 cm.What will the bubble's diameter be when it reaches the surface? (Assume constant temperature. )

Accepted Answer

A)  0.7 cm 
B)  1.0 cm 
C)  1.4 cm 
D)  1.6 cm 
A)  0.7 cm 
B)  1.0 cm 
C)  1.4 cm 
D)  1.6 cm

Question 3

One way to heat a gas is to compress it.A gas at 1.00 atm at 25.0°C is compressed to one tenth of its original volume,and it reaches 30.0 atm pressure.What is its new temperature?

Accepted Answer

A)  1500 K 
B)  621°C 
C)  1192°C 
D)  919°C 
A)  1500 K 
B)  621°C 
C)  1192°C 
D)  919°C

Question 4

In the relationship ΔP ∝ ΔT ,what scale is used for temperature?

Accepted Answer

A)  Fahrenheit 
B)  Celsius 
C)  Kelvin 
D)  Both Celsius and Kelvin may be used since the degree size is the same for both. 
A)  Fahrenheit 
B)  Celsius 
C)  Kelvin 
D)  Both Celsius and Kelvin may be used since the degree size is the same for both.

Question 5

The sulfur hexafluoride molecule consists of one sulfur atom and six fluorine atoms.The atomic masses of sulfur and fluorine are 32.0 u and 19.0 u,respectively.One-half mole of this very heavy gas has what mass?

Accepted Answer

A)  32 g 
B)  73 g 
C)  146 g 
D)  608 g 
A)  32 g 
B)  73 g 
C)  146 g 
D)  608 g

Question 6

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

Accepted Answer

A)  0.3 
B)  3.0 
C)  5.0 
D)  25.0 
A)  0.3 
B)  3.0 
C)  5.0 
D)  25.0

Question 7

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

Accepted Answer

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

Question 8

Four moles of nitrogen gas are contained in an enclosed cylinder with a movable piston.If the molecular mass of nitrogen is 28 u,how many grams of nitrogen are present?

Accepted Answer

A)  0.14 
B)  56 
C)  42 
D)  112 
A)  0.14 
B)  56 
C)  42 
D)  112

Question 9

Which law is for a quantity of gas held at constant volume?

Accepted Answer

A)  Boyle's law 
B)  Charles's law 
C)  Gay-Lussac's law 
D)  Avogadro's law 
A)  Boyle's law 
B)  Charles's law 
C)  Gay-Lussac's law 
D)  Avogadro's law

Question 10

The mass of a hot-air balloon and its cargo (not including the air inside)is 250 kg.The air outside is at a temperature of 10°C and a pressure of 1 atm = 105 N/m2.The volume of the balloon is 400 m3.Which temperature below of the air in the balloon will allow the balloon to just lift off? (Air density at 10°C is 1.25 kg/m3. )

Accepted Answer

A)  37°C 
B)  293°C 
C)  99°C 
D)  200°C 
A)  37°C 
B)  293°C 
C)  99°C 
D)  200°C

Question 11

9.0 g of water in a 2.0-L pressure vessel is heated to 300°C.What is the pressure inside the container? (R = 0.082 L · atm/mol · K,one mole of water has a mass of 18 grams)

Accepted Answer

A)  12 atm 
B)  16 atm 
C)  24 atm 
D)  32 atm 
A)  12 atm 
B)  16 atm 
C)  24 atm 
D)  32 atm

Question 12

What is the internal energy of a monatomic ideal gas with pressure 6 ×105 Pa and with volume 2 m3?

Accepted Answer

A)  6 × 105 J 
B)  18 × 105 J 
C)  9 × 105 J 
D)  More information is needed to find this value. 
A)  6 × 105 J 
B)  18 × 105 J 
C)  9 × 105 J 
D)  More information is needed to find this value.

Question 13

Avogadro's number is related to the universal gas constant R and the number of moles n by:

Accepted Answer

A)  NA = Rn 
B)  NA = R/n 
C)  NA = n/R 
D)  Avogadro's number cannot be related to these two quantities alone. 
A)  NA = Rn 
B)  NA = R/n 
C)  NA = n/R 
D)  Avogadro's number cannot be related to these two quantities alone.

Question 14

A pressure of 2.0 × 10−7 mm of Hg is achieved in a vacuum system.How many gas molecules are present per liter volume if the temperature is 293 K? (760 mm of Hg = 1 atm,R = 0.0821 L · atm/mol · K,and NA = 6.02 × 1023)

Accepted Answer

A)  16 × 1018 
B)  6.6 × 1012 
C)  3.3 × 1012 
D)  3.4 × 109 
A)  16 × 1018 
B)  6.6 × 1012 
C)  3.3 × 1012 
D)  3.4 × 109

Question 15

An ideal gas is confined to a container with adjustable volume.The pressure and mole number are constant.By what factor will volume change if absolute temperature doubles?

Accepted Answer

A)  4.0 
B)  2.0 
C)  1/2 
D)  1/4 
A)  4.0 
B)  2.0 
C)  1/2 
D)  1/4

Question 16

Estimate the volume of a helium-filled balloon if it is to lift a payload of 1000 kg.The density of air is 1.29 kg/m3 and helium has a density of 0.178 kg/m3.

Accepted Answer

A)  4410 m3 
B)  900 m3 
C)  450 m3 
D)  225 m3 
A)  4410 m3 
B)  900 m3 
C)  450 m3 
D)  225 m3

Question 17

A 4.00-L container holds half a mole of an ideal gas at a pressure of 18.5 atm.What is the gas temperature? (R = 0.0821 L · atm/mol · K)

Accepted Answer

A)  1800 K 
B)  1190 K 
C)  901 K 
D)  450 K 
A)  1800 K 
B)  1190 K 
C)  901 K 
D)  450 K

Question 18

The value 1.38 × 10−23 J/K is known as:

Accepted Answer

A)  the universal gas constant. 
B)  Boltzmann's constant. 
C)  Avogadro's number. 
D)  the molar specific. 
A)  the universal gas constant. 
B)  Boltzmann's constant. 
C)  Avogadro's number. 
D)  the molar specific.

Question 19

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 20

Tricia puts 66 g of dry ice (solid CO2)into a 2.0-L container and seals the top.The dry ice turns to gas at room temperature (20°C).Find the pressure increase in the 2.0-L container.(One mole of CO2 has a mass of 44 g and R = 0.0821 L·atm/mol·K.Ignore the initial volume of the dry ice. )

Accepted Answer

A)  6.0 atm 
B)  12 atm 
C)  18 atm 
D)  2.0 atm 
A)  6.0 atm 
B)  12 atm 
C)  18 atm 
D)  2.0 atm

Exam 15: Electric Forces and Electric Fields: Part A

If the average kinetic energy of the molecules of a monatomic ideal gas at 60°C is doubled,what is the resulting temperature of the gas?

A spherical air bubble originating from a scuba diver at a depth of 30.0 m has a diameter of 1.0 cm.What will the bubble's diameter be when it reaches the surface? (Assume constant temperature. )

One way to heat a gas is to compress it.A gas at 1.00 atm at 25.0°C is compressed to one tenth of its original volume,and it reaches 30.0 atm pressure.What is its new temperature?

In the relationship ΔP ∝ ΔT ,what scale is used for temperature?

The sulfur hexafluoride molecule consists of one sulfur atom and six fluorine atoms.The atomic masses of sulfur and fluorine are 32.0 u and 19.0 u,respectively.One-half mole of this very heavy gas has what mass?

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

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

Four moles of nitrogen gas are contained in an enclosed cylinder with a movable piston.If the molecular mass of nitrogen is 28 u,how many grams of nitrogen are present?

Which law is for a quantity of gas held at constant volume?

9.0 g of water in a 2.0-L pressure vessel is heated to 300°C.What is the pressure inside the container? (R = 0.082 L · atm/mol · K,one mole of water has a mass of 18 grams)

What is the internal energy of a monatomic ideal gas with pressure 6 ×105 Pa and with volume 2 m3?

Avogadro's number is related to the universal gas constant R and the number of moles n by:

A pressure of 2.0 × 10−7 mm of Hg is achieved in a vacuum system.How many gas molecules are present per liter volume if the temperature is 293 K? (760 mm of Hg = 1 atm,R = 0.0821 L · atm/mol · K,and NA = 6.02 × 1023)

An ideal gas is confined to a container with adjustable volume.The pressure and mole number are constant.By what factor will volume change if absolute temperature doubles?

Estimate the volume of a helium-filled balloon if it is to lift a payload of 1000 kg.The density of air is 1.29 kg/m3 and helium has a density of 0.178 kg/m3.

A 4.00-L container holds half a mole of an ideal gas at a pressure of 18.5 atm.What is the gas temperature? (R = 0.0821 L · atm/mol · K)

The value 1.38 × 10−23 J/K is known as:

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?

Tricia puts 66 g of dry ice (solid CO2)into a 2.0-L container and seals the top.The dry ice turns to gas at room temperature (20°C).Find the pressure increase in the 2.0-L container.(One mole of CO2 has a mass of 44 g and R = 0.0821 L·atm/mol·K.Ignore the initial volume of the dry ice. )

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

Particle Collisions, Mediating Photons, and Quark Structures: Exploring the Fundamentals of Physics

What is the internal energy of a monatomic ideal gas with pressure 6 ×10⁵ Pa and with volume 2 m³?

A pressure of 2.0 × 10−⁷ mm of Hg is achieved in a vacuum system.How many gas molecules are present per liter volume if the temperature is 293 K? (760 mm of Hg = 1 atm,R = 0.0821 L · atm/mol · K,and N_A = 6.02 × 10²³)

Estimate the volume of a helium-filled balloon if it is to lift a payload of 1000 kg.The density of air is 1.29 kg/m³ and helium has a density of 0.178 kg/m³.

The value 1.38 × 10−²³ J/K is known as:

Tricia puts 66 g of dry ice (solid CO₂)into a 2.0-L container and seals the top.The dry ice turns to gas at room temperature (20°C).Find the pressure increase in the 2.0-L container.(One mole of CO₂ has a mass of 44 g and R = 0.0821 L·atm/mol·K.Ignore the initial volume of the dry ice. )