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

Answer 1

You get 1368 kJ when 1 mole (46 g) is burned; how much will you get when you burn 12.5 g?

Answer 2

335.5kj

Answer 3

12.5 x (1mol/46.0g) = .271 mol of ethanol

.271 x 1368 = 370

(randi did 1235 Delta H, not 1368)

Answer 4

how about the negative sign?

Answer 5

-371.7

Answer 6

What Rght said