已知H2(g)+Cl2(g)===2HCl(g) ΔH=-184.6 kJ·mol-1,则反应HCl(g)===1/2H2(g)+1/2 Cl2(g)的ΔH为( )
A.+184.6 kJ·mol-1 | B.-92.3 kJ·mol-1 | C.+92.3 kJ | D.+92.3 kJ·mol-1 |
已知H2(g)+Cl2(g)===2HCl(g) ΔH=-184.6 kJ·mol-1,则反应HCl(g)===1/2H2(g)+1/2 Cl2(g)的ΔH为( )
A.+184.6 kJ·mol-1 | B.-92.3 kJ·mol-1 | C.+92.3 kJ | D.+92.3 kJ·mol-1 |