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DeltaU^(@) of combustion of CH(4(g)) at ...

`DeltaU^(@)` of combustion of `CH_(4(g))` at certain temperature is `-"393 kJ mol"^(-1)`. The value of `DeltaH^(@)` is

A

zero

B

` lt Delta_f U^@`

C

` gt Delta_f U^@`

D

equal to `Delta_f U^@`

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The correct Answer is:
B
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