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. Standard Gibbs energy change for the same reaction at `298 K` is

Options

A. `-439.3 kJ mol^(-1)`
B. `-523.2 kJ mol^(-1)`
C. `-221.1 kJ mol^(-1)`
D. `-339.3 kJ mol^(-1)`

Answer

D

Explanation

`DeltaG=DeltaH-TDeltaS`
`DeltaG=-382.64-(-145.6)xx10^(-3)xx298`
`=-339.3 kJ mol^(-1)`