| 苯甲酸在醇-水混合物中溶解和离解的焓和熵 |
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| 引用本文： | 胡新根,林瑞森,宗汉兴.苯甲酸在醇-水混合物中溶解和离解的焓和熵[J].物理化学学报,1999,15(9):838-844. |
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| 作者姓名： | 胡新根 林瑞森 宗汉兴 |
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| 作者单位： | Department of Chemistry,Zhejiang University,Hangzhou 310027 |
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| 基金项目： | 国家自然科学基金资助项目!(29773041) |
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| 摘 要： | 羟基化合物水溶液,尤其是一元醇与水的混合物在许多领域都有重要应用.其溶液性质常常显示出异常的特征,如粘度-组成曲线出现极大值1]等.单靠氢键的概念已不能很好解释所观察到的许多特异性质.一般认为这类特殊性质来源于溶液结构.但到目前为止,对这类体系的结构性质的认识仍然比较模糊.焓、熵等热力学性质可以验证诸如用ＮＭＲ谱2]、近红外差示光谱3]等实验手段所得到的结果.实际上,热力学性质提供了一个简单可靠的结构“探针”4,5].本文选择苯甲酸作为研究对象,测定它在乙醇水和异丙醇水两种混合溶剂中的溶解焓和离解焓,并结合文献报导…
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| 关 键 词： | 苯甲酸 混合溶剂 溶解焓 离解焓 |
| 收稿时间： | 1998-11-30 |
| 修稿时间： | 1999-02-09 |
Enthalpies and Entropies of Dissolution and Dissociation of Benzoic Acid in EtOH H_2O and i-PrOH-H_2O Mixtures |
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| Hu Xingen,Lin Ruisen,Zong Hanxing.Enthalpies and Entropies of Dissolution and Dissociation of Benzoic Acid in EtOH H_2O and i-PrOH-H_2O Mixtures[J].Acta Physico-Chimica Sinica,1999,15(9):838-844. |
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| Authors: | Hu Xingen Lin Ruisen Zong Hanxing |
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| Institution: | Department of Chemistry,Zhejiang University,Hangzhou 310027 |
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| Abstract: | In this paper,the dissolution and dissociation enthalpies of benzoic acid in ethanol water and isopropanol H 2O mixtures have been determined by two kinds of microcalorimeters respectively.Combined with the corresponding Gibbs function changes existing in the literature,the dissolution and dissociation entropies have been calculated.Great efforts have been made to interpret the characteristic variations of the transfer enthalpies and entropies according to the skin phase model for solute solvent interactions and the structure alteration of the mixed solvents. |
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| Keywords: | Benzoic acid Mixed solvent Dissolution enthalpy Dissociation enthalpy Skin phase model |
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