The heat of combustion of benzene determined | vedclass

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(B) In a bomb calorimeter,the reaction is carried out at constant volume.According to the first law of thermodynamics,the heat evolved at constant vol

Vedclass · Accepted Answer

$-870$

Vedclass · Answer

(B) In a bomb calorimeter,the reaction is carried out at constant volume.According to the first law of thermodynamics,the heat evolved at constant volume is equal to the change in internal energy,$\Delta E$ (or $\Delta U$).Therefore,the heat of combustion measured in a bomb calorimeter is directly equal to $\Delta E$.Given,$\Delta H_{combustion} = -870 \ kcal \ mol^{-1}$ (measured in a bomb calorimeter).Thus,$\Delta E = -870 \ kcal \ mol^{-1}$.

The heat of combustion of benzene determined in a bomb calorimeter is $-870 \ kcal \ mol^{-1}$ at $25 \ ^oC$. The value of $\Delta E$ for the reaction is......$kcal$.

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