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Namita Mahabir
Asked: 2022-11-11T19:30:58+05:30 In:

Calculate the enthalpy of combustion of benezene from the following data`:-`
(i) `6C(s) + 3H_(2)(g) rarr C_(6)H_(6) (l), DeltaH =49.0 kJ mol^(-1) `
(ii) `H_(2) (g) + (1)/(2) O_(2)(g) rarrH_(2)O(l) , DeltaH = – 285.8 kJ mol^(-1)`
(iii) `C(s) + O_(2) (g) rarr CO_(2)(g) , DeltaH = – 389. 3 kJ mol^(-1)`

Calculate the enthalpy of combustion of benezene from the following data`:-`
(i) `6C(s) + 3H_(2)(g) rarr C_(6)H_(6) (l), DeltaH =49.0 kJ mol^(-1) `
(ii) `H_(2) (g) + (1)/(2) O_(2)(g) rarrH_(2)O(l) , DeltaH = – 285.8 kJ mol^(-1)`
(iii) `C(s) + O_(2) (g) rarr CO_(2)(g) , DeltaH = – 389. 3 kJ mol^(-1)`
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1 Answer

  1. Correct Answer – `-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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