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# 8 x 10 9 2 x 10 9 8 x 10 6 32 x 10 2 8 x 10 3 PowerPoint PPT Presentation

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. 8 x 10 9 2 x 10 9 8 x 10 6 32 x 10 2 8 x 10 3.

8 x 10 9 2 x 10 9 8 x 10 6 32 x 10 2 8 x 10 3

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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.

• 8 x 109

• 2 x 109

• 8 x 106

• 32 x 102

• 8 x 103

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

• The quantity of thermal energy exchanged by two bodies in contact is directly proportional to the difference in their temperatures.

• You only need to know the amount of thermal energy a body contains to calculate its temperature.

• The temperature of a body is directly proportional to the amount of work the body has performed.

• The quantity of thermal energy exchanged by two bodies in contact is inversely proportional to the difference in their temperatures.

• 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.

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

• An isothermal compression of an ideal gas.

• An isobaric expansion of an ideal gas.

• An adiabatic expansion of an ideal gas.

• The freezing of a quantity of liquid at its melting point.

• The evaporation of a quantity of a liquid at its boiling point.

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

• The internal energy of a system cannot change if the heat transferred to the system is equal to the work done by the system.

• A system can do work externally only if its internal energy decreases.

• The internal energy of a system that interacts with its environment must change.

• No matter what other interactions take place, the internal energy must change if a system undergoes a heat transfer.

• The only changes that can occur in the internal energy of a system are those produced by non-mechanical forces.

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

• no heat is transferred between a system and its surroundings

• the pressure remains constant

• the temperature remains constant

• the volume remains constant

• the internal energy is not constant

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.

• 4.2 x 105

• 2 x 105

• 7.5 x 104

• 18 x 105

• 420

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

• no heat is transferred between a system and its surroundings

• the pressure remains constant

• the temperature remains constant

• the volume remains constant

• the internal energy is not constant