Question 1

In an isochoric process,the internal (thermal)energy of an ideal gas decreases by 50 J. How much work does the gas do during this process?

Accepted Answer

A)  0.00 J 
B)  25 J 
C)  50 J 
D)  -25 J 
E)  -50 J 
A)  0.00 J 
B)  25 J 
C)  50 J 
D)  -25 J 
E)  -50 J

Question 2

The gas in a perfectly insulated system does work at a rate of 13 W.At what rate is the internal (thermal)energy of the gas changing?

Accepted Answer

A)  -13 W 
B)  13 W 
C)  0.00 W 
D)  6.5 W 
A)  -13 W 
B)  13 W 
C)  0.00 W 
D)  6.5 W

Question 3

When a gas undergoes an isothermal process,there is

Accepted Answer

A)  no change in the pressure of the gas. 
B)  no change in the temperature of the gas. 
C)  no change in the volume of the gas. 
D)  no work done by (or on) the gas. 
E)  no heat added to the gas. 
A)  no change in the pressure of the gas. 
B)  no change in the temperature of the gas. 
C)  no change in the volume of the gas. 
D)  no work done by (or on) the gas. 
E)  no heat added to the gas.

Question 4

During an isothermal process,5.0 J of heat is removed from an ideal gas. What is the change in internal (thermal)energy of the gas?

Accepted Answer

A)  0.00 J 
B)  2.5 J 
C)  5.0 J 
D)  7.5 J 
E)  10 J 
A)  0.00 J 
B)  2.5 J 
C)  5.0 J 
D)  7.5 J 
E)  10 J

Question 5

In an isochoric process,the internal (thermal)energy of an ideal gas decreases by 50 J. How much heat is exchanged with the gas during this process?

Accepted Answer

A)  0.00 J 
B)  25 J 
C)  50 J 
D)  -25 J 
E)  -50 J 
A)  0.00 J 
B)  25 J 
C)  50 J 
D)  -25 J 
E)  -50 J

Question 6

A quantity of ideal gas requires 800 kJ to raise the temperature of the gas by 10.0 K when the gas is maintained at constant volume. The same quantity of gas requires 900 kJ to raise the temperature of the gas by 10.0 K when the gas is maintained at constant pressure. What is the adiabatic constant γ for this gas?

Accepted Answer

A)  0.889 
B)  1.13 
C)  1.22 
D)  1.67 
E)  1.40 
A)  0.889 
B)  1.13 
C)  1.22 
D)  1.67 
E)  1.40

Question 7

An ideal gas initially at 300 K and occupying a volume of 20 L is adiabatically compressed.If its final temperature is 400 K and γ = 1.30,what is its final volume?

Accepted Answer

A)  7.7 L 
B)  14 L 
C)  22 L 
D)  52 L 
A)  7.7 L 
B)  14 L 
C)  22 L 
D)  52 L

Question 8

A thermally isolated system is made up of a hot piece of aluminum and a cold piece of copper; the aluminum and the copper are in thermal contact.The specific heat of aluminum is more than double that of copper.Which object experiences the greater temperature change during the time the system takes to reach thermal equilibrium?

Accepted Answer

A)  The copper experiences a greater temperature change. 
B)  The aluminum experiences a greater temperature change. 
C)  Neither; both objects experience the same magnitude temperature change. 
D)  It is impossible to tell without knowing the masses. 
E)  It is impossible to tell without knowing the volumes. 
A)  The copper experiences a greater temperature change. 
B)  The aluminum experiences a greater temperature change. 
C)  Neither; both objects experience the same magnitude temperature change. 
D)  It is impossible to tell without knowing the masses. 
E)  It is impossible to tell without knowing the volumes.

Question 9

Heat is added to a 2.0 kg piece of ice at a rate of 793.0 kW.How long will it take for the ice to melt if it was initially at 0.00°C? (The latent heat of fusion for water is 334 kJ/kg and its latent heat of vaporization is 2260 kJ/kg.)

Accepted Answer

A)  0.84 s 
B)  530,000 s 
C)  4.7 s 
D)  670 s 
A)  0.84 s 
B)  530,000 s 
C)  4.7 s 
D)  670 s

Question 10

When a solid melts

Accepted Answer

A)  the temperature of the substance increases. 
B)  the temperature of the substance decreases. 
C)  heat energy leaves the substance. 
D)  heat energy enters the substance. 
A)  the temperature of the substance increases. 
B)  the temperature of the substance decreases. 
C)  heat energy leaves the substance. 
D)  heat energy enters the substance.

Exam 20: Energy Transferred Thermally

In an isochoric process,the internal (thermal)energy of an ideal gas decreases by 50 J. How much work does the gas do during this process?

The gas in a perfectly insulated system does work at a rate of 13 W.At what rate is the internal (thermal)energy of the gas changing?

When a gas undergoes an isothermal process,there is

During an isothermal process,5.0 J of heat is removed from an ideal gas. What is the change in internal (thermal)energy of the gas?

In an isochoric process,the internal (thermal)energy of an ideal gas decreases by 50 J. How much heat is exchanged with the gas during this process?

An ideal gas initially at 300 K and occupying a volume of 20 L is adiabatically compressed.If its final temperature is 400 K and γ = 1.30,what is its final volume?

Heat is added to a 2.0 kg piece of ice at a rate of 793.0 kW.How long will it take for the ice to melt if it was initially at 0.00°C? (The latent heat of fusion for water is 334 kJ/kg and its latent heat of vaporization is 2260 kJ/kg.)

When a solid melts

Foundations

A: Foundations

Motion in One Dimension

Acceleration

Momentum

Energy

Principle of Relativity

Interactions

Force

Work

Motion in a Plane

Motion in a Circle

Torque

Gravity

Special Relativity

Periodic Motion

Waves in One Dimension

Waves in Two and Three Dimensions

Fluids

Entropy

Degradation of Energy

Electric Interactions

The Electric Field

Gausss Law

Work and Energy in Electrostatics

Charge Separation and Storage

Magnetic Interactions

Magnetic Fields of Charged Particles in Motion

Changing Magnetic Fields

Changing Electric Fields

Electric Circuits

Electronics

Ray Optics

Wave and Particle Optics

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