摘要:15.已知反应:+ O2(g)== CO2(g) △H = -393.5kJ/mol + O2(g)== 2CO2(g) △H = -566.0kJ/mol 则反应:C(s)+ O2的△H 是B A.-221 kJ/mol B.-110.5 kJ/mol C.+110.5 kJ/mol D.+221 kJ/mol 化学键 Si-O O=O Si-Si 键能/kJ·mol-1 X 498.8 176
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已知反应:(1)C(s)+ O2(g)==CO2(g) △H = -393.5kJ/mol
(2)2CO(g)+ O2(g)==2CO2(g) △H = -566.0kJ/mol
则反应: C(s)+ 1/2O2(g)==CO(g)的△H为
A.-221 kJ/mol B.-110.5 kJ/mol C.+110.5 kJ/mol D.+221 kJ/mol
查看习题详情和答案>>已知在298K时下述反应的有关数据:
C(s)+1/2 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. -172.5kJ• mol-1 D. -504 kJ• mol-1
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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),△H 2= -393.5kJ/mol
则C(s)+CO2(g)=2CO(g) 的△H ( )
A.283.5kJ/mo B 172.5kJ/mol C -172.5kJ/mol D.-504 kJ/mol
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