1.1mol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 B.C(s)+1/2O2 △H =-393.5 kJ/mol C.C+O2=CO2 △H =-393.5 kJ/mol D.C(s)+O2(g)=CO2(g) △H =-393.5 kJ/mol 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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