KCAL problem Help

thedude60526 · Post by **thedude60526** » Sun Oct 21, 2007 8:27 pm

Ethanol is now being produced (CH₃CH₂OH) as an alternative "green" fuel. Determine the amount of energy produced by the combustion of 1 mole of ethanol. (C-H=100 kcal/mol, C-C=84 kcal/mol, C-O=87 kcal/mol, O-H=112 kcal/mol, O=O=120 kcal/mol, C=O=195 kcal/mol) Can anyone help I don't know where to start.

paully · Post by **paully** » Wed Oct 24, 2007 4:50 am

first start with a balanced equation so you know the products you are dealing with and take it from there

to make it easier CH₃CH₂OH can be written as C₂H₆O

so 2C₂H₆O + 7O₂ = 6H₂O + 4CO₂

then look at you enthralpy conversion rates for alcohols and figure out the total energy produced per mole i dont have any notes in front of me im in the middle of the bush but your txt book should tell ya[/b]