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It is important to note that standard Gibbs energy is not a criterion of spontaneity, and thus, it is not correct to indicate that the dissolution processes are not spontaneous based on dG¡ã values that are always positive. Real criterion is expressed as dG = dG¡ã + RT ln x, with x lower than x at saturation. In this way, dG would be negative if the solution is unsaturated. 1. dG = dG¡ã + RT ln x, with x lower than x at saturation£¬Õâ¾ä»°²»Ì«Àí½â£¬x´ú±íÈÜÖʵÄĦ¶ûŨ¶È£¬xÊÇСÓÚ±¥ºÍʱµÄx¡£ 2. Ϊʲô˵Èç¹ûÈÜÒº²»±¥ºÍ£¬ÄÇôdG¾ÍÊÇÊǸºÊý¡£±¾ÈË×öµÄÈܽâ¶È£¬Ò»¶¨Î¶ÈÏ£¬ÈÜÒº´ïµ½¹ÌҺƽºâÓ¦¸Ã¾ÍÊÇ´ïµ½±¥ºÍÈÜÒºÁË£¿ |
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4Â¥2016-06-30 18:26:00
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404825552(±ùµã½µÎ´ú·¢): ½ð±Ò+10 2016-06-30 09:56:15
404825552: ½ð±Ò+8, ¡ï¡ï¡ïºÜÓаïÖú 2016-06-30 20:25:05
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jiagle
ר¼Ò¹ËÎÊ (ÖªÃû×÷¼Ò)
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- ºì»¨: 513
- Ìû×Ó: 8620
- ÔÚÏß: 1197.9Сʱ
- ³æºÅ: 1960227
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- ÐÔ±ð: GG
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