Question

One mole of a perfect gas expands isothermally to ten times its original volume

Answer 1

We have, heat absorbed by the gas qrev=−Wrev = 2.303 nRT logV2V1

Change in Entropy ΔS=qrevT = 2.303 nR logV2V1

Here, n=1 and V2V1=10

∴ΔS=2.303×1×R×log10=2.303×R×1= 2.303 R