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If the work done on the system or by the system is zero, which one of the following statements for a gas kept at a certain temperature is correct?

Options

  1. AChange in internal energy of the system is equal to flow of heat in or out of the system.
  2. BChange in internal energy of the system is less than heat transferred.
  3. CChange in internal energy of the system is more than the heat flow.
  4. DCannot be determined.

Correct answer

A. Change in internal energy of the system is equal to flow of heat in or out of the system.

Step-by-step solution

when the system does work on the surroundings it is termed as positive while in the opposite case it is termed negative. When net flow of energy is zero it shows heat flowing inside the system is equal to heat going outside the system.

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