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Calculate the heat of combustion of benz...

Calculate the heat of combustion of benzene form the following data:
a. `6C(s) +3H_(2)(g) rarr C_(6)H_(6)(l), DeltaH = 49.0 kJ`
b. `H_(2)(g) +1//2O_(2)(g) rarr H_(2)O(l), DeltaH =- 285.8 kJ`
c. `C(s) +O_(2) (g) rarr CO_(2)(g), DeltaH =- 389.3 kJ`

Text Solution

Verified by Experts

The correct Answer is:
`-3242.2 kJ mol^(-1)`
Aim `: C_(6)H_(6) (l) + (15)/(2) O_(2)(g) rarr 6CO_(2)(g) +3H_(2)O(l) , DeltaH = ?`
`6 xx `Eqn. (ii) `+ 3 xx `Eqn. (ii) `- `Eqn. (i) gives the required result.
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