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AIIMS 2016
Exam
AIIMS
Year
2016
Subject
Physics
Chapter
Thermal Properties of Matter

AIIMS 2016 · Physics · Thermal Properties of Matter

Assertion : The specific heat of a gas in an adiabatic process is...

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.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

A. If both assertion and reason are true and reason is the correct explanation of assertion.

Step-by-step solution

In adiabatic process, no heat transfer takes place between gas and surrounding i.e., ΔQ=0\Delta Q=0 From definition of specific heat, C=ΔQmΔT=0C=\frac{\Delta Q}{m \Delta T}=0 Again, for isothermal process, ΔT=0\Delta T=0 ∴C=ΔQmΔT=∞\therefore \quad C=\frac{\Delta Q}{m \Delta T}=\infty
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