Calculate DeltaHrxn for the following reaction:

Question

C + H2O --> CO + H2

Use the following:
C + O2 --> CO2 DeltaH = -393.5 kJ
2CO + O2 --> 2CO2 DeltaH = -566.0 kJ
2H2 + O2 --> 2H2O Delta H = -483.6 kJ

DeltaHrxn = ?

Answer 1

equation 1 as is.
#2 reverse and take 1/2
#3 reverse and take 1/2