已知:CH4(g)+H2O(g)=CO(g)+3H2(g)△H=+206kJ•mol-1CH4(g)+CO2(g)=2CO(g)+2H2(g)△H=+247kJ•mol-1
C-H键的键能约为413kJ/mol,O-H键的键能约为463kJ/mol,H-H键的键能约为436kJ/mol,则CO2中C=O键的键能约为()
A.797.5kJ/mol
B.900.5kJ/mol
C.962.5kJ/mol
D.1595kJ/mol