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The heat of formation of methane C(s)+2H...

The heat of formation of methane` C(s)+2H_2(g)rarrCH_4(g)` at constant is 18500 cal at `25^@C`. The heat of reaction at constant volume would be:

A

19096 cal

B

18798 cal

C

18202 cal

D

17904 cal

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The correct Answer is:
A
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