Gasohol contains ethanol (C2H4OH)(l), which when burned reacts with oxygen to produce CO2(g) and H2O(g). How much heat is released when 12.5g of ethanol burns?

Question

C2H5OH(l) + 3 O2(g) --> 2 CO2(g) + 3H2O(l)

Delta H = -1368kJ

Chemistry - DrBob222, Wednesday, May 19, 2010 at 9:34pm
You get 1368 kJ when 1 mole (46 g) is burned; how much will you get when you burn 12.5 g?

I don't know how you would solve this. :(

Answer 1

Let's try something different.
You get 1368 kJ for a mol of C2H5OH. How many moles C2H5OH do you have in 12.5 g C2H5OH?
Then 1368 kJ/mol x mol = ?? kJ.

Answer 2

1760kj