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Heat of formation of benzene, CO(2(g)) a...

Heat of formation of benzene, `CO_(2(g)) and H_(2)O_((l))` are 45 kJ, -394 kJ and - 286 kJ respectively. Hence heat of combustion of benzene is

A

- 1885 kJ

B

`- 3177` kJ

C

- 3267 kJ

D

- 4080 kJ

Text Solution

Verified by Experts

The correct Answer is:
C
`C_(6)H_(6(l))+(15)/(2) O_(2(g)) rarr 6CO_(2(g)) +3H_(2)O_((l)), Delta H=?`
`Delta H = Sigma H _(P) - Sigma H_(R)=(6xx-394+3xx-286)-45`
`=(-2364+-858)-45=-3267 kJ`
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