来自惠娟的问题
【LiH可作飞船的燃料,已知下列反应:①2Li(s)+H2(g)===2LiH(s)ΔH=-182kJ·mol-1;②2H2(g)+O2(g)===2H2O(l)ΔH=-572kJ·mol-1;③4Li(s)+O2(g)===2Li2O(s)ΔH=-1196kJ&m】
LiH可作飞船的燃料,已知下列反应:
①2Li(s)+H2(g)===2LiH(s) ΔH=-182kJ·mol-1;
②2H2(g)+O2(g)===2H2O(l) ΔH=-572kJ·mol-1;
③4Li(s)+O2(g)===2Li2O(s) ΔH=-1196kJ·mol-1。
则LiH在O2中燃烧的热化学方程式为()
A.2LiH(s)+O2(g)===Li2O(s)+H2O(l) ΔH=-702kJ·mol-1
B.2LiH(s)+O2(g)===Li2O(s)+H2O(l) ΔH=-1950kJ·mol-1
C.2LiH(s)+O2(g)===Li2O(s)+H2O(l) ΔH=-1586kJ·mol-1
D.2LiH(s)+O2(g)===Li2O(s)+H2O(g) ΔH=-988kJ·mol-1
1回答
2020-10-26 07:32