盖斯定律练习题

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盖斯定律练习题1.(1)H2S的燃烧热ΔH=-akJ·mol-1,则H2S燃烧反应的热化学方程式为。(2)已知:高温下,在密闭容器中用H2还原WO2可得到金属钨。当温度过高时,WO2(s)会转变为WO2(g)。请根据以下反应:①WO2(s)+2H2(g)W(s)+2H2O(g);ΔH=+66.0kJ·mol-1②WO2(g)+2H2(g)W(s)+2H2O(g);ΔH=-137.9kJ·mol-1计算出WO2(s)WO2(g)ΔH=______________________。2.已知:①2CO(g)+O2(g)=2CO2(g)△H=-566kJ/mol②2H2(g)+O2(g)=2H2O(g)△H=-484kJ/mol③CH4(g)+2O2(g)=CO2(g)+2H2O(g)△H=-890kJ/mol则:CH4(g)+CO2(g)=2CO(g)+2H2(g)△H=________________________。3.我国是个钢铁大国,钢铁产量为世界第一,高炉炼铁是最为普遍的炼铁方法。高炉内可能发生的反应:①C(s)+O2(g)=CO2(g)△H1=-393.5kJ/mol②C(s)+CO2(g)2CO(g)△H2=+172.5kJ/mol③4CO(g)+Fe3O4(s)=4CO2(g)+3Fe(s)△H3=-13.7kJ/mol则:3Fe(s)+2O2(g)=Fe3O4(s)ΔH=________________________。4.已知下列反应的反应热:①CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l)ΔH1=-870.3kJ/mol②C(s)+O2(g)=CO2(g)ΔH2=-393.5kJ/mol③H2(g)+1/2O2(g)=H2O(l)ΔH3=-285.8kJ/mol则:2C(s)+O2(g)+2H2(g)=CH3COOH(l)ΔH=_______________________。5.已知反应:①H2(g)+21O2(g)==H2O(g)△H1②N2(g)+2O2==2NO2(g)△H2③12N2(g)+23H2(g)==NH3(g)△H3则:4NH3(g)+7O2(g)==4NO2(g)+6H2O(g)ΔH=(用含△H1、△H2、△H3的式子表示)。6.已知:①3Fe2O3(s)+CO(g)2Fe3O4(s)+CO2(g)△H=–47kJ/mol②Fe3O4(s)+CO(g)3FeO(s)+CO2(g)△H=+19kJ/mol③FeO(s)+CO(g)Fe(s)+CO2(g)△H=–11kJ/mol则:Fe2O3(s)+3CO(g)2Fe(s)+3CO2(g)△H=。7.甲醇是一种优质燃料,可制作燃料电池。工业上可用下列两种反应制备甲醇:①CO(g)+2H2(g)CH3OH(g)ΔH1②CO2(g)+3H2(g)CH3OH(g)+H2O(g)ΔH2③2H2(g)+O2(g)=2H2O(g)ΔH3则:2CO(g)+O2(g)=2CO2(g)ΔH=(用ΔH1、ΔH2、ΔH3表示)。8.已知:①N2(g)+O2(g)=2NO(g)△H=akJ·mol-1②N2(g)+3H2(g)=2NH3(g)△H2=bkJ·mol-1③2H2(g)+O2(g)=2H2O(g)△H=ckJ·mol-1则:4NH3(g)+4NO(g)+O2(g)=4N2(g)+6H2O(g)△H=。9.生产水煤气过程中有以下反应:①C(s)+CO2(g)2CO(g)△H1;②CO(g)+H2O(g)H2(g)+CO2(g)△H2;③C(s)+H2O(g)CO(g)+H2(g)△H3;上述反应△H3与△H1、△H2之间的关系为。

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