Work done and PV diagramHard

Net Heat Absorbed in Cyclic Process

A poly-atomic molecule (C_V = 3R, C_P = 4R, where R is gas constant) goes from phase space point A(P_A = 10⁵ Pa, V_A = 4 × 10^–6m³) to point B (P_B = 5 × 10⁴ Pa, V_B = 6 × 10^–6m³) to point C (P_C = 10⁴ Pa, V_C = 8 × 10^–6m³). 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 :

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