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In a refrigerator, the work done on the system is used to:

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Question: In a refrigerator, the work done on the system is used to:

Options:

  1. Increase the internal energy
  2. Decrease the internal energy
  3. Transfer heat from cold to hot
  4. Transfer heat from hot to cold

Correct Answer: Transfer heat from cold to hot

Solution: 

In a refrigerator, work is done on the system to transfer heat from a colder body to a hotter body, which is against the natural flow of heat.

In a refrigerator, the work done on the system is used to:

Practice Questions

Q1
In a refrigerator, the work done on the system is used to:
  1. Increase the internal energy
  2. Decrease the internal energy
  3. Transfer heat from cold to hot
  4. Transfer heat from hot to cold

Questions & Step-by-Step Solutions

In a refrigerator, the work done on the system is used to:
  • Step 1: Understand that a refrigerator is a machine that keeps things cold.
  • Step 2: Know that heat naturally moves from hot areas to cold areas.
  • Step 3: Realize that a refrigerator needs to move heat from inside (cold) to outside (hot).
  • Step 4: Learn that to move heat from cold to hot, the refrigerator needs energy or work done on it.
  • Step 5: Conclude that the work done on the refrigerator helps it transfer heat against the natural flow.
  • Thermodynamics – The principles governing heat transfer and work done in thermodynamic systems.
  • Heat Transfer – The process of moving heat from one body to another, particularly from a colder to a hotter body in refrigeration.
  • Refrigeration Cycle – The cycle in which work is done to remove heat from a low-temperature reservoir and reject it to a high-temperature reservoir.
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