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Question

A system undergoes a process in which work done by the system equals the decrease in its internal energy. The system must have undergone


A
isothermal process
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B
isobaric process
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C
isochoric process
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D
adiabatic process
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Solution

The correct option is D adiabatic process
According to first law of thermodynamics,
dQ=dU+dW
Since dW=dU
dQ=0
Hence the heat transfer across the system is zero. Therefore the process might be adiabatic.
 

Physics

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