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JEE Main 20252 AprilMorning Shift
Exam
JEE Main
Year
2025
Date
2 April
Shift
Morning Shift
Subject
Physics
Chapter
Thermodynamics

JEE Main 2025 · 2 April · Morning Shift · Physics · Thermodynamics

In an adiabatic process, which of the following statements is true?

In an adiabatic process, which of the following statements is true?

Options

  1. AThe molar heat capacity is infinite
  2. BWork done by the gas equals the increase in internal energy
  3. CThe molar heat capacity is zero
  4. DThe internal energy of the gas decreases as the temperature increases

Correct answer

C. The molar heat capacity is zero

Step-by-step solution

For adiabatic process, dQ=0\mathrm{dQ}=0
∴\therefore Molar heat capacity =0=0
∵dQ=0⇒dU=−dW\because \mathrm{dQ}=0 \Rightarrow \mathrm{dU}=-\mathrm{dW}
Also dU=f2nRdT\mathrm{dU}=\frac{\mathrm{f}}{2} \mathrm{nRdT}
∴\therefore Only option (3) is correct.
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