高温下,某反应达平衡,平衡常数,恒容时,温度升高,H2浓度减小

高温下,某反应达平衡,平衡常数,恒容时,温度升高,H2浓度减小。下列说法正确的是

A.该反应的焓变为正值

B.恒温恒容下,增大压强, H2 浓度一定减小

C.升高温度,逆反应速率减小

D.该反应的化学方程式为 CO + H2OCO2 + H2

 

答案

A

解析:

 

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