18.1mol碳完全燃烧后可放出393.5KJ的热量.下列热化学方程式正确的是: A.C(s)+O2(g)=CO2(g), △H = +393.5 kJ•mol-1 B.C(s)+O2, △H = -393.5 kJ•mol-1 C.C+O2=CO2 , △H = -393.5 kJ•mol-1 D.C(s)+O2(g)=CO2(g), △H = -393.5 kJ•mol-1 查看更多

 

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1mol碳完全燃烧后可放出393.5KJ的热量,下列热化学方程式正确的是(     )    

A.C(固)+O2(气)=CO2(气); △H ="+393.5" kJ/mol
B.C(固)+O2(气)=CO(气); △H ="-393.5" kJ/mol
C.C + O2= CO2△H ="-393.5" kJ/mol
D.C(固)+O2(气)=CO2(气); △H ="-393.5" kJ/mol

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1mol碳完全燃烧后可放出393.5KJ的热量,下列热化学方程式正确的是(     )    

A.C(固)+O2(气)=CO2(气); △H ="+393.5" kJ/mol

B.C(固)+O2(气)=CO(气); △H ="-393.5" kJ/mol

C.C + O2= CO2;△H ="-393.5" kJ/mol

D.C(固)+O2(气)=CO2(气); △H ="-393.5" kJ/mol

 

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1mol碳完全燃烧后可放出393.5KJ的热量,下列热化学方程式正确的是: 

A.C(s)+O2(g)=CO2(g);      △H = +393.5 kJ•mol-1   

B.C(s)+O2(g)=CO(g);    △H = -393.5 kJ•mol-1 

C.C+O2=CO2                             △H = -393.5 kJ•mol-1   

D.C(s)+O2(g)=CO2(g);     △H = -393.5 kJ•mol-1 

 

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1mol碳完全燃烧后可放出393.5KJ的热量,下列热化学方程式正确的是(     )    
A.C(固)+O2(气)=CO2(气); △H ="+393.5" kJ/mol
B.C(固)+O2(气)=CO(气); △H ="-393.5" kJ/mol
C.C + O2= CO2△H ="-393.5" kJ/mol
D.C(固)+O2(气)=CO2(气); △H ="-393.5" kJ/mol

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1mol碳完全燃烧后可放出393.5KJ的热量,下列热化学方程式正确的是: 

A.C(s)+O2(g)=CO2(g);      △H = +393.5 kJ??mol-1   

B.C(s)+O2(g)=CO(g);    △H = -393.5 kJ??mol-1  

C.C+O2=CO2                             △H = -393.5 kJ??mol-1    

D.C(s)+O2(g)=CO2(g);     △H = -393.5 kJ??mol-1  

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