(10分)试回答下列各问题: (1)如图Ⅰ所示是1 mol NO2和CO反应生成

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问题:

(10分)试回答下列各问题:

(1)如图Ⅰ所示是1 mol NO2和CO反应生成 CO2和NO过程中能量变化示意图,请写出NO2和CO反应的热化学方程式:                                 

(2)化学反应的焓变与反应物和生成物的键能有关。

①已知:H2(g)+Cl2(g) ="=="  2HCl(g)  ΔH="-185" kJ/mol;

键能ΔH298(H—H)="436" kJ/mol,ΔH298(Cl—Cl)="247" kJ/mol,则ΔH298(H—Cl)=         

②图Ⅱ表示氧族元素中的氧、硫、硒(Se)、碲生成氢化物时的焓变数据,根据这组焓变数据可确定a、b、c、d分别代表的元素,试写出硒化氢发生分解反应的热化学方程式:                       

(3)已知: ①Fe2O3(s)+3CO(g)  2Fe(s)+3CO2(g)   ΔH="-a" kJ/mol

②3Fe2O3(s)+CO(g)  2Fe3O4(s)+CO2(g) ΔH="-b" kJ/mol

③Fe3O4(s)+CO(g)  3FeO(s)+CO2(g)   ΔH="+ckJ/mol"

则FeO(s) +CO(g) Fe(s)+CO2(g)   ΔH=-               

考点:焓变、反应热中和热燃烧热
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