A:H2(g)+Cl2(g)═ 12 HCl(g)△H=+92.4KJ/mol
B:H2(g)+Cl2(g)═ 12 HCl(g)△H=﹣92.4KJ/mol
C:H2(g)+Cl2(g)═2HCl(g)△H=﹣184.8KJ/mol
D:H2(g)+Cl2(g)═2HCl(l)△H=+184.8 KJ/mol