What is the standard Gibbs energy change for the reaction at 298 K, if standard enthalpy and standard entropy changes for the oxidation of ammonia at 298 K are 382.64 kJ $mol^{-1}$ and -145.6 $JK^{-1}mol^{-1}$, respectively.

Question

(a) -523.2 kJ $mol^{-1}$
(b) -221.1 kJ $mol^{-1}$
(c) -339.3 kJ $mol^{-1}$
(d) -439.3 kJ $mol^{-1}$