Excess molar volumes and isentropic compressibilities of binary liquid mixtures containing n-alkanes at 298.15 K

Pramana

T Nautiyal¹  V Vyas1¹ 

[1] Bio-Acoustics Research Laboratory, Department of Chemistry, University of Allahabad, Allahabad 211 002, India$$

关键词: Excess molar volume;    binary liquid mixtures;    isentropic compressibility;    intermolecular interactions.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Excess molar volumes (𝑉E) and deviation in isentropic compressibilities (𝛥𝛽s) have been investigated from the density 𝜌 and speed of sound 𝑢 measurements of six binary liquid mixtures containing 𝑛-alkanes over the entire range of composition at 298.15 K. Excess molar volume exhibits inversion in sign in one binary mixture, i.e., n-heptane + n-hexane. Remaining five binary mixtures, n-heptane + toluene, cyclohexane + n-heptane, cyclohexane + n-hexane, toluene + nhexane and n-decane + n-hexane show negative excess molar volumes over the whole composition range. However, the large negative values of excess molar volume becomes dominant in toluene + n-hexane mixture. Deviation in isentropic compressibility is negative over the whole range of composition in the case of all the six binary mixtures. Existence of specific intermolecular interactions in the mixtures has been analyzed in terms of excess molar volume and deviation in isentropic compressibility.

【 授权许可】

Unknown