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

Options

A. `35.8 J mol^(-1) K^(-1)`
B. `322 J mol^(-1)K^(-1)`
C. `42.3 J mol^(-1)K^(-1)`
D. `38.3 J mol^(-1)K^(-1)`

Answer

D

Explanation

`DeltaS=2.303 nR log"(V_(2))/(V_(1))`
`=2.303xx2xx8.314 M log"(100)/(10)`
`=38.3 J mol^(-1) K^(-1)`