Consider the processes A and B shown in the figure. It is possible that: 1. Both the processes are isothermal. 2. Both the processes are adiabatic. 3. A is isothermal and B is adiabatic. 4. A is adiabatic and B is isothermal.

Consider the processes A and B shown in the figure. It is possibl…

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Question

Consider the processes A and B shown in the figure. It is possible that:

Both the processes are isothermal.
Both the processes are adiabatic.
A is isothermal and B is adiabatic.
A is adiabatic and B is isothermal.

✓

Answer

A is isothermal and B is adiabatic.

Explanation:

The slope of an adiabatic process is greater than that of an isothermal process. Since A and B are initiated from the same initial state, both cannot be isothermal or adiabatic, as they would be overlapping. But the curve of process B is steeper than the curve of process A. Hence, A is isothermal and B is adiabatic.

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