试题 试卷
题型:填空题 题类:常考题 难易度:普通
用盖斯定律进行有关反应热的计算
N2(g)+3H2O(l)=2NH3(g)+1.5O2(g),△H.
已知:N2(g)+3H2(g)=2NH3(g)△H=a kJ/mol,
2H2(g)+O2(g)=2H2O(l)△H=b kJ/mol,
则N2(g)+3H2O(l)=2NH3(g)+1.5O2(g)的△H=kJ/mol(用含a、b的式子表示).
H2S(g)+ O2(g)═SO2(g)+H2O(g)△H12H2S(g)+SO2(g)═ S2(g)+2H2O(g)△H2
2H2S(g)+O2(g)═2 S(g)+2H2O(g)△H32S(g)═S2(g)△H4
则△H4的正确表达式为( )
·(1)4Al(s)+3O2(g)═2Al2O3(s)△H=﹣2 834.9kJ•mol﹣1
·(2)4Al(s)+2O3(g)═2Al2O3(s)△H=﹣3 119.1kJ•mol﹣1
由此得出的正确结论是( )
C10H18(l) C10H12(l)+3H2(g) △H1
C10H12(l) C10H8(l)+2H2(g) △H2
△H1>△H2>0;C10H18→C10H12的活化能为Ea1 , C10H12→C10H8的活化能为Ea2 , 十氢奈的常压沸点为192℃;在192℃,液态十氢奈的脱氢反应的平衡转化率约为9%。请回答:
反应Ⅰ(主):CH3OH(g)+H2O(g) CO2(g)+3H2(g) △H1=+49 kJ/mol
反应Ⅱ(副):H2(g)+CO2(g) CO(g)+H2O(g) △H2
反应Ⅲ:CH3OH(g) CO(g)+2H2(g) △H3=+90kJ/mol
①C(s) + H2O(g)=CO(g) + H2 (g) ΔH1 = akJ·mol−1
②CO(g) + H2O(g)=CO2(g) + H2 (g) ΔH2 = bkJ·mol−1
③CO2 (g) + 3H2 (g)=CH3OH(g) + H2O(g) ΔH3 = ckJ·mol−1
④2CH3OH(g)=CH3OCH3 (g) + H2O(g) ΔH4 = dkJ·mol−1
试题篮