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 |
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 |