JEE Main202118 Mar 2021Evening ShiftPhysicsThermodynamicsActual
For an adiabatic expansion of an ideal gas, the fractional change in its pressure is equal to (where γ is the ratio of specific heats):
Options
- A- γ d V V
- B- γ V d V
- C- 1 γ d V V
- Dd V V
Correct answer
A. - γ d V V
Step-by-step solution
⇒ P V γ = constant Differentiating, ⇒ d P d V = - γ P V ⇒ d P P = - γ d V V