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

Answer

B

Explanation

`DeltaS=2.303nR" "log_(10)(V_(2)//V_(1))`
`=2.303xx2xx8.314log_(10)(100//10)`
`=38.3JK^(-1)" "mol^(-1)`