QuestionThermodynamics / adiabatic process
What will be the slope of the plot of log P vs log V for a reversible adiabatic expansion of an ideal gas? [γ = Cp/Cv]
- (a) γ
- (b) – γ
- (c) zero
- (d) –1
Answer: (b) – γ
Reversible adiabatic: PV^γ = constant → log P = −γ log V + constant. Slope of log P vs log V = −γ → (b). (Isothermal: slope −1.)