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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-1B.+172.

题目详情
已知在298K时下述反应的有关数据:
C(s)+1/2O 2 (g) === CO(g) △H 1 = -110.5 kJ·mol -1
C(s)+O 2 (g) === CO 2 (g) △H 2 = -393.5 kJ·mol -1
则C(s)+CO 2 (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
▼优质解答
答案和解析
B