Can someone help me with this question:
"The following mean bond enthalpies have been obtained from a data book. Use these values to calculate the standard enthalpy of combustion of cyclopropane.
C-C = 347 kjmol-1
C-H= 413 Kjmol-1
C=O = 805 kjmol-1
O=O = 498 Kjmol-1
O-H = 464Kjmol-1
I got the equation for the combustion to be C3H6 + 4.5H20 ---> 3H20 + 3C02
Then I did total products - total reactants
I got 1882 which I think is wrong?
Can someone help me
Edit: Apparently it is the other way round when it is combustion, can someone explain this to me? So -1854 is the answer?