①2H2(g)+CO(g)═CH3OH(g)△H=﹣90.8kJ•mol﹣11′
②2CH3OH(g)═CH3OCH3(g)+H2O(g)△H=﹣23.5kJ•mol﹣1
③CO(g)+H2O(g)═CO2(g)+H2(g)△H=﹣41.3kJ•mol﹣1
总反应:3H2(g)+3CO(g)═CH3OCH3(g)+CO2(g)的△H=
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