高温下,某反应达平衡,平衡常数K= .恒容时,温度升高,H2浓度减

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

A升高温度,逆反应速率减小

B恒温恒容下,增大压强,H2浓度一定减小

C该反应的焓变为正值

D该反应化学方程式为CO+H2OCO2+H2

答案

C

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