JEE Main201910 Apr 2019Evening ShiftPhysicsKinetic Theory of GasesActual
When heat Q is supplied to a diatomic gas of rigid molecules, at constant volume its temperature increases by ∆ T . The heat required to produce the same change in temperature, at a constant pressure is:
Options
- A3 2 Q
- B7 5 Q
- C5 3 Q
- D2 3 Q
Correct answer
B. 7 5 Q
Step-by-step solution
For diatomic gas C P = 7 2 R C V = 5 2 R Heat supplied at constant volume Q = n C V Δ T Heat supplied at constant pressure Q ' = n C P Δ T Q Q ' = C V C P Q ' = Q C P C V = 7 5 Q