Question

If you burn 13.7 g of methane (CH4) burns in oxygen, then 686 kJ is evolved. What is the amount of heat produced per mole of methane burned?

Answer 1

CH4 + 2O2 --> CO2 + 2H2O
So you get 686 kJ for 13.7 g CH4. How much heat will you get for 1 mol (16 g)?
Thats 686 kJ x 16/13.7 = ? kJ

Answer 2

thank you i got 801.1678 is that correct

Answer 3

I think so but you have too many significant figures. If your prof is picky about s.f. s/he will count off points.