Determine the heat capacity (in calories/C

1
Determine the heat capacity (in calories/C) of a
lake containing two million gallons
(approximately 8 million kilograms) of water at
15C. Select the correct answer.

1. 8 x 109
2. 2 x 109
3. 8 x 106
4. 32 x 102
5. 8 x 103

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2
Which of the following statements is true?
Select the correct answer.

1. The quantity of thermal energy exchanged by two
   bodies in contact is directly proportional to the
   difference in their temperatures.
2. You only need to know the amount of thermal
   energy a body contains to calculate its
   temperature.
3. The temperature of a body is directly
   proportional to the amount of work the body has
   performed.
4. The quantity of thermal energy exchanged by two
   bodies in contact is inversely proportional to
   the difference in their temperatures.
5. Different amounts of thermal energy are
   transferred between two bodies in contact if
   different temperature scales are used to measure
   the temperature difference between the bodies.

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3
In which process will the internal energy of the
system NOT change? Select the correct answer.

1. An isothermal compression of an ideal gas.
2. An isobaric expansion of an ideal gas.
3. An adiabatic expansion of an ideal gas.
4. The freezing of a quantity of liquid at its
   melting point.
5. The evaporation of a quantity of a liquid at its
   boiling point.

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4
Which statement below regarding the First Law of
Thermodynamics is best? Select the correct
answer.

1. The internal energy of a system cannot change if
   the heat transferred to the system is equal to
   the work done by the system.
2. A system can do work externally only if its
   internal energy decreases.
3. The internal energy of a system that interacts
   with its environment must change.
4. No matter what other interactions take place, the
   internal energy must change if a system undergoes
   a heat transfer.
5. The only changes that can occur in the internal
   energy of a system are those produced by
   non-mechanical forces.

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5
In an isovolumetric process _____ . Select
the correct answer.

1. no heat is transferred between a system and its
   surroundings
2. the pressure remains constant
3. the temperature remains constant
4. the volume remains constant
5. the internal energy is not constant

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6
How many calories of heat are required to raise
the temperature of 5 kg of water from 60 to the
boiling point? Select the correct answer.

1. 4.2 x 105
2. 2 x 105
3. 7.5 x 104
4. 18 x 105
5. 420

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7
In an isothermal process _____ . Select the
correct answer.

1. no heat is transferred between a system and its
   surroundings
2. the pressure remains constant
3. the temperature remains constant
4. the volume remains constant
5. the internal energy is not constant

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