The heat of combustion of ethanol determined by a bomb calorimeter is -670.48 Kcal/mol at 25°C. What is at 25°C for the following reaction?
-335.24 Kcal
-669.28 Kcal
-670.48 Kcal
+ 670.48 Kcal
As learnt in
Enthalpy of combustion -
Amount of Enthalpy change when 1 mole of substance is completly burn in excess of Oxygen
- wherein
Reversible and Irreversible Isochoric process -
- wherein
Bomb calorimeter works under constant volume conditions
Therefore,
Option 1)
-335.24 Kcal
Incorrect
Option 2)
-669.28 Kcal
Incorrect
Option 3)
-670.48 Kcal
correct
Option 4)
+ 670.48 Kcal
Incorrect