题目

—What arethe girls doing on the playground? —They are(跳过)there. 答案：【1】skipping相关数据如下表： H2(g)Br2(g)HBr(g)1mol分子中的化学键断裂时需要吸收的能量/kJ436200369则已知H2(g) + Br2(g) =" 2HBr" (g)△H 为A.△H =" +" 102kJ/molB.△H =" -" 102kJ/molC.△H =" +" 267kJ/molD.△H =" -" 267kJ/mol