The molar entropy content of `1 ` mole of oxygen `(O_(2))` gas at `300 K` and `1 atm` is `250 J mol e^(-1)K^(-1)`. Calculate `DeltaG` when 1 mole of oxygen is expanded reversibility and isothermally from `300K`, 1 atm to double its volume ( Take `R=8.314J mol e^(-1)K^(-1),log e=2.303)`

A. 1.728 KJ `"mole"^(-1)K^(-1)`

B. 0

C. `-1.728 KJ "mole"^(-1)K^(-1)`

D. `0.75 KJ "mole"^(-1)K_(1)`