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The combustion enthalpies of carbon, hyd...

The combustion enthalpies of carbon, hydrogen and methane are `-395.5 "kJ" mol^-1, -285.8 "kJ" mol^-1 "and" -890.4 kJ mol^-1 "respectively at " 25^@C`. The value of standard formation enthalpy of methane at that temperature is ____________ .

A

`890.4" kJ mol"^(-1)`

B

`-298.8" kJ mol"^(-1)`

C

`-76.7" kJ mol"^(-1)`

D

`-107.7" kJ mol"^(-1)`

Text Solution

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The correct Answer is:
C
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