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From reactions(1)～(5)below select without any

2022-08-11 23:12:40 问答库阅读 192 次

问题详情

From reactions(1)～(5)below，select，without any thermodynamic calculations those reactions which have：(a)large negative standard entropy changes，(b)large positive standard entropy changes，(c)small entropy changes which might be either positive or negative.
(1)Mg(s)+Cl₂(g)===MgCl₂(s)
(2)Mg(s)+I₂(s)===MgI₂(s)
(3)C(s)+O₂(g)===CO₂(g)
(4)Al₂O₃(s)+3C(s)+3Cl₂(g)===2AlCl₃(g)+3CO(g)
(5)2NO(g)+Cl₂(g)===2NOCl(g)

参考答案

Solution： (1)large negative standard entropy changes：(1)，(5).
(2)large positive standard entropy changes：(4).
(3)small entropy changes which might be either positive or negative(2)，(3).