Thermal Energy when Heating and Cooling a Cabaret

In summary, the conversation is about using a heat source to warm chilled air back to room temperature. However, using all the heat from the cooling system can cause the cabaret air to become hotter than the outdoor air. This is because when work is done on air, thermal energy is created, which can increase the temperature of the air. Therefore, it is important to be careful and not return all the pumped heat plus the newly disordered energy to the cabaret air.
  • #1
Dreebs
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Homework Statement


Having chilled the air until it contains only the perfect amount of moisture, you want to reheat it to the ideal cabaret temperature. You could use an electric space heater or wood fire, but you already have another source of heat: the same system that chilled the air in the first place. Instead of sending its heat outdoors, you can use some of that heat to warm the chilled air back to room temperature. But you have to be careful: if you use all of the heat that's released by the cooling system, the cabaret air will become hotter than the outdoor air! Why?
a. When the entropy produced by the cooling system becomes thermal energy and is added to the cabaret air, it will increase the temperature of the cabaret air above that of the outdoor air.
b. Pumping the heat from cold to hot requires that some ordered energy, such as electricity, become disordered. If you return all the pumped heat plus the newly disordered electrical energy to the room air, its temperature will rise above its starting temperature.
c. Whenever you change the temperature of an object, you create thermal energy. With more thermal energy in the cabaret air than before you cooled it, the temperature of the cabaret air will rise above that of the outdoor air.
d. The heat released by the cooling system is located far from the cabaret. To convey that heat back from its hotter source to the colder cabaret air requires work and this work will become thermal energy in the cabaret air. With the addition of that new thermal energy, the temperature of the cabaret air will rise above that of the outdoor air.

Homework Equations


N/A

The Attempt at a Solution


D, in order to move anything work is required. When doing work on something like air thermal energy is created in the process. So by moving the already warm air + the newly created thermal energy back into the cabaret, the place will become hotter than before.
 
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  • #2
I am unsure of this as well. I am thinking either B or D. More towards B, as it doesn't say anything about the heat being far away from the cabaret.
 

Related to Thermal Energy when Heating and Cooling a Cabaret

1. What is thermal energy?

Thermal energy is the energy that a substance possesses due to its temperature. It is a form of kinetic energy that is associated with the motion of particles within a substance.

2. How is thermal energy related to heating and cooling a cabaret?

When heating a cabaret, thermal energy is transferred from a heat source to the cabaret, causing its temperature to increase. When cooling a cabaret, thermal energy is transferred from the cabaret to its surroundings, causing its temperature to decrease.

3. What factors affect the amount of thermal energy in a cabaret?

The amount of thermal energy in a cabaret is affected by its mass, specific heat capacity, and initial and final temperatures. The type and duration of the heat source or cooling method used also play a role.

4. How can thermal energy be measured in a cabaret?

Thermal energy can be measured in a cabaret using a thermometer to measure its temperature. The change in temperature can then be used to calculate the amount of thermal energy gained or lost.

5. How can thermal energy be conserved when heating and cooling a cabaret?

To conserve thermal energy when heating and cooling a cabaret, it is important to minimize heat loss or gain to the surroundings. This can be achieved by using insulation materials, sealing any openings or cracks, and using efficient heating and cooling methods.

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