Which entropy change is positive?
A、O2(g)+2H2(g)=2H2O(g);
B、CaCO3(s)=CaO(s)+CO2(g);
C、N2(g)+3H2(g)=2NH3(g);
D、2Mg(s)+O2(g)=2MgO(s)
发布时间：2025-08-16 18:14:12
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答案：CaCO3(s)=CaO(s)+CO2(g)
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