- #1
Hamal_Arietis
- 156
- 15
Homework Statement
The heat of combustion of graphite and that of CO is 394kJ/mol and 283 kJ/mol, respectively. When 12g of graphite is combusted incompletely, the same volume of CO and CO2 are generated. Calculate the heat of generated by this combustion. Choose the closet value.(kJ)
A.197 B.253 C.308 D.339 E.505 F.677
Homework Equations
The answer is B.253kJ
The Attempt at a Solution
My idea is:
##C+O2→CO\\
1 \qquad \qquad 1## and ##ΔH_1=-394kJ/mol##
##CO+O2→CO2\\
0,5 \qquad \qquad 0,5## and ##ΔH_2=-0,5.283 kJ/mol##
So ##ΔH=ΔH_1+ΔH_2=-535,5kJ/mol##
Where is my wrong?
Thanks for helping