试题 试卷
题型：单选题 题类：常考题 难易度：容易
2016-2017学年广东省广州市培正中学高二上学期期中化学试卷
①C(s)＋O2(g)＝CO2(g)；△H1 C(s)＋1/2O2 (g)＝CO(g)；△H2
②S(s)＋O2(g)＝SO2(g)；△H3 S(g)＋O2(g)＝SO2(g)；△H4
③H2(g)＋1/2O2(g)＝H2O(l)；△H5 2H2(g)＋O2(g)＝2H2O(l)；△H6
④CaCO3(s)＝CaO(s)＋CO2(g)；△H7 CaO(s)＋H2O(l)＝Ca(OH)2(s)；△H8
①2Li(s)+ H2(g)=2LiH(s) △H=-182 kJ/mol
②2H2(g)+O(g)=2H2O1) △H=- 572 kJ/mol
③4Li(s)+O2(g) = 2Li2O(s) △H=-1196 kJ/mol
则反应2LiH(s)+O2(g)=Li2O(s)+H2O(l)的焓变为（ ）
试题篮
