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

`Delta G= Delta H- T Delta S`
`Delta G= -382.64 - (-145.6) xx 10^(-3) xx 298`
`= -339.3 kJ mol^(-1)`