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【单选题】
下列反应达到平衡后,增大总压力或降低温度,使平衡逆向移动的是A.
2NO(g)+O2(g)=2NO2(g)ΔH<0
B.
CO(g)+H2O(g)=CO2(g)+H2(g)ΔH>0
C.
SO2(s)+1/2O2(g)=SO3(g)ΔH<0
D.
MgCO3(s)=MgO(s)+CO2(g)ΔH>0
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