问题
不定项选择题
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
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
答案
答案:B
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
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
答案:B