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DeltaH^(Theta)underset(f)' 298K of metha...

`DeltaH^(Theta)underset(f)' 298K` of methanol is given by the chemical equation

A

`CH_(4)(g) + 1//2 O_(2)(g) rarr CH_(3) OH (g)`

B

C (graphite) `+1/2O_(2) (g) + 2H_(2)(g) rarr CH_(3)OH (l)`

C

C (diamond) `+1//2 O_(2) (g) + 2H_(2)(g) rarr CH_(3)OH(l)`

D

`CO(g) + 2H_(2)(g) rarr CH_(3)OH(l)`

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Verified by Experts

The correct Answer is:
B
Carbon is not in its elementary form in diamond. Heat of formation is derived from the constituent elements which so option (b) represents
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