Q. The curve for the given process is given below. What will be its following curve
Question

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Solution:

Process ab is adiabatic expansion. So pressure in the process decreases as .
Process bc is straight line passing through origin that means . From ideal gas equation,
So pressure during the process must be constant.
Process ca is isothermal. Final graph will have three sections :
(1) isothermal (2) adiabatic (3) isobaric