问题标题:
N2(g)+2O2(g)═2NO2(g)△H1=+67.7kJ•mol-1,N2H4(g)+O2(g)═N2(g)+2H2O(g)△H2=-534kJ•mol-1,则2N2H4(g)+2NO2(g)═3N2(g)+4H2O(g)的△H是()A.-1135.7kJ•mol-1B.601.7kJ•mol-1C.-466
问题描述:
N2(g)+2O2(g)═2NO2(g)△H1=+67.7kJ•mol-1,N2H4(g)+O2(g)═N2(g)+2H2O(g)△H2=-534kJ•mol-1,则2N2H4(g)+2NO2(g)═3N2(g)+4H2O(g)的△H是()
A.-1 135.7 kJ•mol-1
B.601.7 kJ•mol-1
C.-466.3 kJ•mol-1
D.1 000.3 kJ•mol-1
方启宏回答:
①N2(g)+2O2(g)═2NO2(g)△H1=+67.7kJ•mol-1,②N2H4(g)+O2(g)═N2(g)+2H2O(g)△H2=-534kJ•mol-1,则将方程式2×②-①得2N2H4(g)+2NO2(g)=3N2(g)+4H2O(g),△H,依据盖斯定律:△H=2×△H2-...
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