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InterviewSolution
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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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Answer» 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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