One mole of an ideal monoatomic gas expands isothermally against constant external pressure of 1 atm from initial volume of 1l to a state where its final pressure becomes equal to external pressure. If initial temperature of gas is 300K then total entropy change of system in the above process is: [R =0.082L atm `mol^(-1)K^(-1)= 8.3J mol^(-1) K^(-1)`]

Options

A. 0
B. R ln (24.6)
C. R ln (2490)
D. `(3)/(2)` R ln (24.6)

Answer

B