Entropy is a measure of randomess of system. When a liquid is converted to the vapour state entropy of the system increases. Entropy in the phase transformation is calculated using `Delta S = (Delta H)/(T)` but in reversible adiabatic process `Delta`S will be zero. The rise in temperature in isobaric or isochoric process increases the randomness of system, which is given by
`Delta S = "2.303 n C log"((T_(2))/(T_(1)))`
`C = C_(P) or C_(V)`
The change in entropy when 1 mole `O_(2)` gas expands isothermally and reversibly from an initial volume 1 litre to a final volume 100 litre at `27^(@)C`

Options

A. `20.5JK^(-1(mol^(-1)`
B. `38.29 JK^(-1)mol^(-1)`
C. `42.50 JK^(-1)mol^(-1)`
D. `50.65 JK^(-1)mol^(-1)`

Answer

B