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7-2 已知在SATP下CH4(g)、H2O(g)、CO2(g)、H2(g)的 分别为-74.81、-241.82、-393.51、0kJ•mol-1,其 分别为187.9、188.72、213.6、130.57 J•K-1•mol-1。求298K时反应CH4(g)+2H2O(g)=CO2(g)+ 4H2(g)的 和 。
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