相关HClg12H2的文学知识

问题详情：已知H2(g)+Cl2(g)=2HCl(g) △H=-184.6kJ/mol，则反应HCl(g)=1/2H2(g)+1/2Cl2(g)的△H为A.+184.6kJ/mol                              B.-92.3kJ/molC.-369.2kJ/mol     ...