Delta Fares

(Ethanol can be made from the fermentation)Balanced equation for the combustion of ethanol. Calculate Delta H?

Ethanol can be made from the fermentation of crops and has been used as a fuel additive to gasoline. a) Write a balanced equation for the combustion of ethanol. Express your answer as a chemical equation. Identify all of the phases in your answer. (the answer is NOT C2H6O+ 3O2 →3H2O+2CO2) which is what I first throught. b) Calculate Delta Δ Hrx

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1. a) The equation you have IS correct, it just doesnt have the phase labels attached. C2H6O(l) + 3O2(g) → 3H2O(l) + 2CO2(g) b) You need the heats of formation (dHf) for H2O(l), CO2(g), and (C2H6O(l). These can be found in a table. dH rx = (3 moles H2O(l))(dHf H2O(l)) + (2 moles CO2(g))(dHf CO2(g)) - (1 mole C2H6O)(dHf C2H6O(l))