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Q.

Two moles of a diatomic ideal gas is expanded isothermally to twice its original volume. If temperature of the gas is 27oC and R=8.3 JouleK-mol, the heat supplied to the gas is Given ln2=0.693

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a

14.72 J

b

18.62 J

c

11.5 J

d

8.75 J

answer is C.

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Detailed Solution

Q=ΔU+W=0+nRT lnV2V1=2×8.3×300 ln2 J⇒Q=2×8.3×0.693 J=11.5 J
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Two moles of a diatomic ideal gas is expanded isothermally to twice its original volume. If temperature of the gas is 27oC and R=8.3 JouleK-mol, the heat supplied to the gas is Given ln2=0.693