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The difference between heats of reaction...

The difference between heats of reaction at constant pressure and constant volume for the reaction.
`2C_(6)H_(6)(l) +15O_2(g) rarr 12CO_(2)(g) + 6H_(2)O(l)` at `25^(@)C` is :

A

`+7.43`

B

`+3.72`

C

`-7.43`

D

`-3.72`

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The correct Answer is:
C
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