The entropy change involved in the isothermal reversible expansion of 2 mol of an ideal gas from a volume of 10 `cm^(3)` to a volume of 100 `cm^(3)` at `27^(@)C` is-

Options

A. `38.3J*mol^(-1)*K^(-1)`
B. `35.8J*mol^(-1)*K^(-1)`
C. `32.3J*mol^(-1)*K^(-1)`
D. `42.3J*mol^(-1)*K^(-1)`

Answer

A

Explanation

For isothermal reversible expansion,
`DeltaS=nR"ln"(V_(2))/(V_(1))=2xx8.314"ln"(100)/(10)=38.3J*mol^(-1)*K^(-1)`