题目内容
【题目】煤化工是以煤为原料,经过化学加工使煤转化为气体、液体、固体燃料以及各种化工产品的工业过程.在煤的气化反应器中发生如下几种反应:
C(s)十H2O(g)═CO(g)+H2(g)△H=+131kJ/mol
C(s)+O2(g)═CO2(g)△H=﹣394kJ/mol
CO(g)+O2(g)═CO2(g)△H=﹣283kJ/mol
则CO(g)+H2O(g)H2(g)+CO2(g)△H=____________.
【答案】﹣41 kJ/mol.
【解析】将3个反应进行编号,①C(s)十H2O(g)═CO(g)+H2(g)△H=+131kJ/mol;②C(s)+O2(g)═CO2(g)△H=﹣394kJ/mol;③CO(g)+O2(g)═CO2(g)△H=﹣283kJ/mol。③
-②+①得CO(g)+H2O(g)
H2(g)+CO2(g),则该反应的△H= ﹣283kJ/mol
-(﹣394kJ/mol)+131kJ/mol=﹣41 kJ/mol.
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