First slide
Thermodynamic processes
Question

One mole of an ideal gas in initial state A undergoes a cyclic process ABCA, as shown in the figure. Its pressure at A is P0.
Choose the correct option(s) from the following

Moderate
Solution

For n moles of gas with f degrees of freedom at temperature T, we have

U=f2nRT

Since, temperature T is same at A and B, so

UA=UB

Also, WAB=nRT0logeVfVi=nRT0loge4V0V0

        WAB=nRT0loge(4)=P0V0loge(4)

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