单选题 容易0.94 引用2 组卷146
下列热化学方程式书写正确的是( )
A.C(s)+O2(g)=CO2(g) △H =+393.5kJ/mol |
B.2SO2+O2=2SO3 △H = —196.6kJ/mol |
C.S(s)+O2(g)=SO2(g)ΔH=-297.23 kJ/mol |
D.2H2(g)+O2(g)=2H2O(l) △H= +571.6kJ |
18-19高二上·新疆昌吉·期中
类题推荐
下列热化学方程式正确的是(△H的绝对值均正确)
A.2NO2N2O4 △H=-57kJ/mol(反应热) |
B.1/2Ba(OH)2(aq)+HCl(aq)==1/2BaCl2(aq)+H2O(l)△H=-57.3kJ/mol(中和热) |
C.S(s)+O2(g)==SO2(g) △H=+269.8kJ/mol(反应热) |
D.C8H18(l)+1/2 O2(g) ==8CO2(g)+9H2O(g) ΔH=-5518kJ·mol-1(燃烧热) |
25℃、101kPa下,碳、氢气、甲烷和辛烷的燃烧热依次是393.5kJ/mol、285.8kJ/mol、890.3kJ/mol、5518kJ/mol,则下列热化学方程式书写正确的是( )
A.C(s)+O2(g)=CO(g) ΔH=-393.5kJ/mol |
B.2H2(g)+O2(g)=2H2O(l) ΔH=+571.6kJ/mol |
C.CH4(g)+2O2(g)=CO2(g)+2H2O(g) ΔH=-890.3kJ/mol |
D.C8H18(l)+O2(g)=8CO2(g)+9H2O(l) ΔH=-5518kJ/mol |
已知:Fe(s)+O2(g)═FeO(s)△H1=-272kJ/mol,2Al(s)+O2(g)═Al2O3(s)△H2="-1" 675kJ/mol,则2Al(s)+3FeO(s)═Al2O3(s)+3Fe(s)的△H是
A.-859 kJ/mol | B.859 kJ/mol |
C.-1403 kJ/mol | D.-2491 kJ/mol |
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