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The difference between the heats of reac...

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

A

`-7.43`

B

`+3.72`

C

`-3.72`

D

`+7.43`

Text Solution

Verified by Experts

The correct Answer is:
A
`Delta H- Delta U = Delta nRT, Delta n=12-15 =- 3 `
`=- 3 xx 8314 xx 298 =- 7432 J =- 7.43 kj `
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