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If __________ between the system and the surroundings, the process is adiabatic.

This question was previously asked in
SSC Scientific Assistant Physics Official Paper (Held On: 24 November 2017 Shift 1)
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  1. both heat and matter flows
  2. heat flows but matter does not flow
  3. neither heat nor matter flows
  4. matter flows but heat does not flow

Answer (Detailed Solution Below)

Option 3 : neither heat nor matter flows
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Detailed Solution

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CONCEPT:

Adiabatic wall:

  • An adiabatic wall is an insulating wall that does not allow the flow of heat energy between the system and its surroundings or between two systems.
  • It is found that (NA, VA) will be in equilibrium with any other possible pair of values (NB, VB).

Diathermic wall:

  • A diathermic wall is a conducting wall, which allows heat energy to flow between the system and its surroundings or between two systems.

EXPLANATION:

  • From above it is clear that if neither heat nor matter flows between the system and the surroundings, then the process is adiabatic. Therefore option 3 is correct.
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