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Question: Answered & Verified by Expert
Assertion : The specific heat of a gas in an adiabatic process is zero and in an isothermal process is infinite.
Reason : Specific heat of gas is directly proportional to change of heat in system and inversely proportional to change in temperature.
PhysicsThermal Properties of MatterAIIMSAIIMS 2016
Options:
  • A If both assertion and reason are true and reason is the correct explanation of assertion.
  • B If both assertion and reason are true but reason is not the correct explanation of assertion.
  • C If assertion is true but reason is false.
  • D If both assertion and reason are false.
Solution:
2244 Upvotes Verified Answer
The correct answer is: If both assertion and reason are true and reason is the correct explanation of assertion.
In adiabatic process, no heat transfer takes place between gas and surrounding i.e., $\Delta Q=0$ From definition of specific heat, $C=\frac{\Delta Q}{m \Delta T}=0$ Again, for isothermal process, $\Delta T=0$
$\therefore \quad C=\frac{\Delta Q}{m \Delta T}=\infty$

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