Question

The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of `10 dm^(3)` to a volume of `100dm^(3)` at `27^(@)C` is
A. `38.3 J mol^(-1) K^(-1)`
B. `35.8 J mol^(-1) K^(-1)`
C. `32.3 J mol^(-1) K^(-1)`
D. `42.3 J mol^(-1) K^(-1)`

Answer 1

Correct Answer - A
`DeltaS=nR In (V_(2))/(V_(1))=2.303 "nR log" (V_(2))/(V_(1)) = 2.303 xx 2 xx 8.314 xx "log"(100)/(10) = 38.3 Jmol^(-1) K^(-1)`