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JEE Main202125 Feb 2021Morning ShiftPhysicsKinetic Theory of GasesActual

A diatomic gas, having C P = 7 2 R and C V = 5 2 R , is heated at constant pressure. The ratio d U : d Q : d W

Options

  1. A3 : 5 : 2
  2. B5 : 7 : 3
  3. C5 : 7 : 2
  4. D3 : 7 : 2

Correct answer

C. 5 : 7 : 2

Step-by-step solution

d U = n C v d T ⇒ d Q = n C p d T ⇒ d W = P d V = n R d T (isobaric process) d U : d Q : d W : C v : C p : R = 5 R 2 : 7 R 2 : R = 5 : 7 : 2 .

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