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Question: Answered & Verified by Expert
n moles of diatomic gas in a cylinder is at a temperature T. Heat is supplied to the cylinder such that the temperature remains constant but n moles of the diatomic gas get converted into monoatomic gas. The change in the total kinetic energy of the gas is
PhysicsThermodynamicsNEET
Options:
  • A 0
  • B 52nRT
  • C 32nRT
  • D 12nRT
Solution:
1097 Upvotes Verified Answer
The correct answer is: 12nRT
Initial kinetic energy of the system,

Ui=N52RT

Final kinetic energy of the system,

Uf=2n32 RT+N-n52RT

=12nRT+52NRT

ΔU=Q=12nRT

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