将1 mol H 2 (g)和2 mol I 2 (g)置于某2 L密闭容器中,在一定温度下发生反应:H 2 (g)+ I 2 (g) 2HI(g)△ H<0,并达到平衡,HI的体积分数ω(HI)随时间变化如图(Ⅱ)所示。若改变反应条件, ω(HI)的变化曲线如图(Ⅰ)所示,则改变的条件可能是
A.
恒温恒容条件下,加入适当催化剂
B.
恒温条件下,缩小反应容器体积
C.
恒容条件下升高温度
D.
恒温条件下,扩大反应容器体积
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