15.已知反應(yīng):+ O2(g)== CO2(g) △H = -393.5kJ/mol + O2(g)== 2CO2(g) △H = -566.0kJ/mol 則反應(yīng):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 化學鍵 Si-O O=O Si-Si 鍵能/kJ·mol-1 X 498.8 176 查看更多

 

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已知反應(yīng):(1)C(s)+ O2(g)==CO2(g)       △H = -393.5kJ/mol

(2)2CO(g)+ O2(g)==2CO2(g)     △H = -566.0kJ/mol

則反應(yīng):  C(s)+  1/2O2(g)==CO(g)的△H為

A.-221 kJ/mol B.-110.5 kJ/mol    C.+110.5 kJ/mol  D.+221 kJ/mol

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已知在298K時下述反應(yīng)的有關(guān)數(shù)據(jù):

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

則C(s)+CO2(g) === 2CO(g) 的△H 為(   )

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時下述反應(yīng)的有關(guān)數(shù)據(jù):

C(s)+1/2 O2(g)=CO(g)  △H1 = -110.5kJ/mol

C(s)+O2(g)=CO2(g),△H 2= -393.5kJ/mol 

則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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已知在298K時下述反應(yīng)的有關(guān)數(shù)據(jù):

C(s)+1/2 O2(g)=CO(g)  △H1 = -110.5kJ/mol

C(s)+O2(g)=CO2(g),△H 2= -393.5kJ/mol 

則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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已知在298K時下述反應(yīng)的有關(guān)數(shù)據(jù):

C(s)+1/2 O2(g)=CO(g)  △H1 = -110.5kJ/mol

C(s)+O2(g)=CO2(g),△H 2= -393.5kJ/mol 

則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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