题型:判断题 已知在298K时下述反应的有关数据:C(s)+1/2O2(g)═CO(g)△H1=-110.5kJ•mol-1C(s)+O2(g)═CO2(g)△H2=-393.5kJ•mol-1则C(s)+CO2(g)═2CO(g) 的△H 为( )A.+283.5kJ•mol-1 B.+172.5kJ•mol-1 C.-172.5kJ•mol-1 D.-504kJ•mol-1 查看答案