(1)向1L1mol/L的NaOH溶液中加入下列物质:①浓H2SO4;②稀硝酸;③稀醋酸,恰好完全反应的热效应为△H1、△H2、△H3 , 则三者由小到大顺序为{#blank#}1{#/blank#} (2)由盖斯定律结合下述反应方程式,回答问题:
①NH3(g)+HCl(g)═NH4Cl(s)△H=﹣176kJ/mol
②NH3(g)+H2O(l)═NH3•H2O(aq)△H=﹣35.1kJ/mol
③HCl(g)+H2O(l)═HCl(aq)△H=﹣72.3kJ/mol
④NH3•H2O(aq)+HCl(aq)═NH4Cl(aq)△H=﹣52.3kJ/mol
则NH4Cl(s)+2H2O(l)═NH4Cl(aq)其△H等于{#blank#}2{#/blank#} kJ/mol.
(3)根据下列热化学方程式分析,写出C(s)燃烧热的热化学方程式{#blank#}3{#/blank#}
C(s)+H2O(l)═CO(g)+H2(g)△H1=+175.3kJ•mol﹣1
2CO(g)+O2(g)═2CO2(g)△H2=﹣566.0kJ•mol﹣1
2H2(g)+O2(g)═2H2O(l)△H3=﹣571.6kJ•mol﹣1 .