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JEE Main 2021 (27 Aug, Shift 1) · Gas Laws & Ideal Gas Equation

Gas Laws & Ideal Gas Equation question from JEE Main 2021 (27 Aug, Shift 1)

Q58JEE Main 2021 · 27 AUG · SHIFT 1Medium

Gas Laws & Ideal Gas Equation

An ideal gas is expanding such that PT3 = constant. The coefficient of volume expansion of the gas is:

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Answer: (c)

  1. From PV=nRTPV = nRT: P∝TVP \propto \frac{T}{V}.
  2. PT3=PT^3 = const ⇒T4V=\Rightarrow \frac{T^4}{V} = const ⇒V∝T4\Rightarrow V \propto T^4.
  3. γV=1VdVdT=4T\gamma_V = \frac{1}{V}\frac{dV}{dT} = \frac{4}{T}.
  4. So the answer is (c) 4T\frac{4}{T}.
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