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题型:单选题 题类:常考题 难易度:普通
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②2H2(g)+O2(g)═2H2O(g)△H=﹣483.6kJ•mol﹣1 .
则制备水煤气的反应C(s)+H2O(g)═CO(g)+H2(g)的△H为( )
C(s)+H2O(l)=CO(g)+H2(g);△H1=+175.3kJ•mol﹣1
2CO(g)+O2(g)=CO2(g);△H2=﹣566.0kJ•mol﹣1
2H2(g)+O2(g)=2H2O(l);△H3=﹣571.6kJ•mol﹣1 .
① CH4(g) = C(s)+2H2(g) △H1 = + 75.0 kJ·mol-1
② CO2(g)+H2(g) = CO(g)+H2O(g) △H2 = + 41.0 kJ·mol-1
③ CO(g)+H2(g) = C(s)+H2O(g) △H3 = -131.0 kJ·mol-1
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