`Delta U^theta` of combustion of methane is `-X kJ mol^(-1) .` The value of `Delta H^0` is
i)`=Delta U^0`
ii) `gtDelta U^0`
iii) `ltDelta U^0`
iv) `=0`

Explanation

iii) .Delta H^0=Delta U^0-2 RT. as .Delta n=-2.