Thermodynamics Question 28

Question: Helium at 27oC has a volume of 8 litres. It is suddenly compressed to a volume of 1 litre. The temperature of the gas will be [γ=5/3] [CBSE PMT 1993; MP PMT 1999; Pb. PMT 2002]

Options:

A) Rγ−1(T2−T1)

B) Rγ−1(T1−T2)

C) R(T1−T2)

D) Zero

Show Answer

Answer:

Correct Answer: A

Solution:

ΔU=−ΔW=−R(T1−T2)(γ−1)

=R(T2−T1)γ−1

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