Physics - Thermodynamics Question with Solution | TestHub

A poly-atomic molecule ( $C_V=3R,C_P=4R$, where $R$ is gas constant) goes from phase space point $\mathrm{A}\left({\mathrm{P}}_{\mathrm{A}}=10^5\mathrm{Pa},{\mathrm{V}}_{\mathrm{A}}=4\times 10^{-6}{\mathrm{m}}^3\right)$ to point $\mathrm{B}\left({\mathrm{P}}_{\mathrm{B}}=5\times 10^4\mathrm{Pa},{\mathrm{V}}_{\mathrm{B}}=6\times 10^{-6}{\mathrm{m}}^3\right)$ to point $\mathrm{C}({\mathrm{P}}_{\mathrm{C}}=10^4$ $\mathrm{Pa},{\mathrm{V}}_{\mathrm{C}}=8\times 10^{-6}{\mathrm{m}}^3)$. A to B is an adiabatic path and $B$ to $C$ is an isothermal path.
The net heat absorbed per unit mole by the system is :