已知在298K时:C(s)+O2(g)=== CO(g) △H1 =-110.5 kJ• mol-1;C(s)+O2(g)===CO2(g) △H2=-393.5 kJ• mol-1则C(s)+CO2(g)=== 2CO(g) 的△H为
A.+283.5 kJ• mol-1 | B.+172.5 kJ• mol-1 | C.-172.5 kJ• mol-1 | D.-504 kJ• mol-1 |
已知在298K时:C(s)+O2(g)=== CO(g) △H1 =-110.5 kJ• mol-1;C(s)+O2(g)===CO2(g) △H2=-393.5 kJ• mol-1则C(s)+CO2(g)=== 2CO(g) 的△H为
A.+283.5 kJ• mol-1 | B.+172.5 kJ• mol-1 | C.-172.5 kJ• mol-1 | D.-504 kJ• mol-1 |