题型:填空题 题类:常考题 难易度:普通
(1)S(s)+O2(g)═SO2(g)△H1 S(g)+O2(g)═SO2(g)△H2
△H1 △H2(用“>”“<”“=”填空)
(2)CH4(g)+2O2(g)═CO2(g)+2H2O(l)△H1 CH4(g)+2O2(g)═CO2(g)+2H2O(g)△H2
△H1 △H2(用“>”“<”“=”填空)
(3)4Al(s)+3O2(g)═2Al2O3(s)△H1 4Fe(s)+3O2(g)═2Fe2O3(s)△H2
△H1 △H2(用“>”“<”“=”填空)
(4)煤作为燃料有2种途径:
途径1﹣﹣直接燃烧:C(s)+O2(g)═CO2(g)△H1<0
途径2﹣﹣先制水煤气:C(s)+H2O(g)═CO(g)+H2(g)△H2>0
再燃烧水煤气:2CO(g)+O2(g)═2CO2(g)△H3<0 2H2(g)+O2(g)═2H2O(g)△H4<0
△H1、△H2、△H3、△H4的关系式是△H1=
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