2008年北京奥运会“祥云”奥运火炬所用环保型燃料为丙烷(C
3H
8),悉尼奥运会所用火炬燃料为65%丁烷(C
4H
10)和35%丙烷,已知:
①CO:2CO(g)+O2(g)=2CO2(g) △H=-566.0kJ/mol
②丙烷:C3H8(g)+5O2(g)=3CO2(g)+4H2O(l) △H=-2221.5kJ/mol
③正丁烷:C4H10(l)+6.5O2(g)=4CO2(g)+5H2O(l) △H=-2855.4kJ/mol
④异丁烷:C4H10(g)+6.5O2(g)=4CO2(g)+5H2O(l) △H=-2869.6kJ/mol
下列说法正确的是( )