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 300 K then total entropy change of system in the above process is
[R = 0.082 L atm mol –1 K–1 = 8.3 J mol –1 K–1 ]
(a) 0
(b) Rln (24.6)
(c) Rln (2490)
(d) 3/2 Rln (24.6)
