Influence of aliphatic amides on the temperature of maximum density of water

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• 作者：André ; s Felipe Torres ; Carmen M. Romero ; ^{cmromeroi@unal.edu.co.Tel}
• 关键词：Amides ; Temperature of maximum density ; Despretz constant ; Water structure ; Solute-solvent interactions
• 刊名：The Journal of Chemical Thermodynamics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：105
• 期：Complete
• 页码：173-178
• 全文大小：660 K
• 卷排序：105

文摘

The addition of amides decreases the temperature of maximum density of water suggesting a disruptive effect on water structure. The amides in aqueous solution do not follow the Despretz equation in the concentration range considered. The temperature shift Δθ as a function of molality is represented by a second order equation. The Despretz constants were determined considering the dilute concentration region for each amide solution. Solute disrupting effect of amides becomes smaller as its hydrophobic character increases.