7-14 已知标准压力下 N 2 O 4 和 NO 2 的平衡混合物 , 在 15°C 、 75°C 时的密度分别为 3.62 、 1.84 g·dm -3 。求反应: N 2 O 4 (g) = 2NO 2 (g) 的 和 。 ( 设 △ C p = 0) 。
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