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For complete combustion of ethanol, C_{2}H_{5}OH(l)+3O_{2}(g)\rightarrow 2CO_{2}(g)+3H_{2}O(l)
the amount of heat produced as in bomb calorimeter, is 1364.47 kJ mol-1 at 250C. Assuming ideality the Enthalpy of combustion (in kJ mol-1), \Delta _{c}H, for the reaction will be:
(R = 8.314 kJ mol-1)

Option: 1

-1366.95


Option: 2

-1361.95


Option: 3

-1460.5


Option: 4

-1350.5


Answers (1)

best_answer

\mathrm{\Delta H_{c}=\Delta E_{c}+\left ( \Delta n \right )_{g}RT}

         \mathrm{=-1364.47\ kJ+(-1)8.314\times 298 J}

          \mathrm{=-\left ( 1364.47+2.48 \right )kJ=-1366.95\ kJ}

 

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Rishi

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