Thermodynamics

JEE Main level, single correct, medium

77 of 190

Question 77 of 190

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

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Answer: (C) The molar heat capacity is zero

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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