450 兆帕以下酒精水溶液的量热分析

IF 5.3 2区 化学 Q2 CHEMISTRY, PHYSICAL Journal of Molecular Liquids Pub Date : 2025-03-10 DOI:10.1016/j.molliq.2025.127357
Jacobo Troncoso
{"title":"450 兆帕以下酒精水溶液的量热分析","authors":"Jacobo Troncoso","doi":"10.1016/j.molliq.2025.127357","DOIUrl":null,"url":null,"abstract":"<div><div>Aqueous solutions of the fully miscible monohydric alcohols, namely, methanol, ethanol, 1-propanol, 2-propanol and <em>tert</em>-butanol are studied using a calorimeter able to work at pressures as high as 450 MPa. Heat capacities of the solutions are determined from the experiments. Apparent heat capacity is calculated from these data. The sharp enhancement of this quantity at low concentrations, typical of amphiphiles such as alcohols, is analyzed against pressure and temperature. Solid-liquid phase equilibria are detected at high pressure for the heaviest alcohols. Remarkably, strong increments in the melting temperature, as compared with those found for atmospheric pressure, are found for solutions at 450 MPa. The results are discussed in terms of the interactions between water and alcohols and the role that hydrophobicity plays in these solutions.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"426 ","pages":"Article 127357"},"PeriodicalIF":5.3000,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Calorimetric analysis of aqueous alcohol solutions up to 450 MPa\",\"authors\":\"Jacobo Troncoso\",\"doi\":\"10.1016/j.molliq.2025.127357\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Aqueous solutions of the fully miscible monohydric alcohols, namely, methanol, ethanol, 1-propanol, 2-propanol and <em>tert</em>-butanol are studied using a calorimeter able to work at pressures as high as 450 MPa. Heat capacities of the solutions are determined from the experiments. Apparent heat capacity is calculated from these data. The sharp enhancement of this quantity at low concentrations, typical of amphiphiles such as alcohols, is analyzed against pressure and temperature. Solid-liquid phase equilibria are detected at high pressure for the heaviest alcohols. Remarkably, strong increments in the melting temperature, as compared with those found for atmospheric pressure, are found for solutions at 450 MPa. The results are discussed in terms of the interactions between water and alcohols and the role that hydrophobicity plays in these solutions.</div></div>\",\"PeriodicalId\":371,\"journal\":{\"name\":\"Journal of Molecular Liquids\",\"volume\":\"426 \",\"pages\":\"Article 127357\"},\"PeriodicalIF\":5.3000,\"publicationDate\":\"2025-03-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Molecular Liquids\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0167732225005240\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Molecular Liquids","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167732225005240","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Calorimetric analysis of aqueous alcohol solutions up to 450 MPa
Aqueous solutions of the fully miscible monohydric alcohols, namely, methanol, ethanol, 1-propanol, 2-propanol and tert-butanol are studied using a calorimeter able to work at pressures as high as 450 MPa. Heat capacities of the solutions are determined from the experiments. Apparent heat capacity is calculated from these data. The sharp enhancement of this quantity at low concentrations, typical of amphiphiles such as alcohols, is analyzed against pressure and temperature. Solid-liquid phase equilibria are detected at high pressure for the heaviest alcohols. Remarkably, strong increments in the melting temperature, as compared with those found for atmospheric pressure, are found for solutions at 450 MPa. The results are discussed in terms of the interactions between water and alcohols and the role that hydrophobicity plays in these solutions.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Journal of Molecular Liquids
Journal of Molecular Liquids 化学-物理:原子、分子和化学物理
CiteScore
10.30
自引率
16.70%
发文量
2597
审稿时长
78 days
期刊介绍: The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.
期刊最新文献
Physicochemical properties of triethylamine hydrochloride-based chloroaluminate ionic liquid A multichannel fluorescent sensor for solid and vapor phase detection of 4-nitroaniline and salicylaldehyde with latent fingerprint and an invisible ink analysis: Extensive experimental and DFT studies Local field and deformation of droplets in emulsions Editorial Board Correlation of thermochemical and spectral characteristics as a method for determining the type of binding of porphyrins to nucleic acids
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1