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