相关数据如下表:
则已知H2(g) + Br2(g) =" 2HBr" (g)△H 为A.△H =" +" 102kJ/mol B.△H =" -" 102kJ/molC.△H =" +" 267kJ/mol D.△H =" -" 267kJ/mol
2Fe2++2I-+2C12 ==2Fe3++ I2+ 4C1-