Volumetric properties of d-galactose in aqueous HCl solution at 278.15 to 318.15 K

✍ Scribed by Kelei Zhuo; Yaohui Liu; Qiufen Zhang; Hongxun Liu; Jianji Wang

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 259 KB
• Volume: 147
• Category: Article
• ISSN: 0167-7322
• DOI: 10.1016/j.molliq.2009.04.001

✦ Synopsis

Hydrochloric acid Standard apparent molar volume Standard partial molar isobaric expansion coefficient

Densities have been measured for D-galactose + HCl + water at 10°intervals from 278.15 to 318.15 K. The apparent molar volumes (V Φ,Gal ) and standard apparent molar volumes (V 0 Φ,Gal ) for D-galactose in aqueous solutions of 0.2 ~2.1 mol kg -1 HCl have been calculated. Volumetric interaction parameters of galactose with HCl in water have also been obtained from transfer volumes. Results show that V Φ,Gal and V 0 Φ,Gal for galactose in aqueous HCl solutions increase with increasing molality of HCl. At a given temperature, the standard transfer apparent molar volumes (Δ t V 0 Φ,Gal ) for galactose from water to aqueous HCl solutions are positive and increase with increasing molality of HCl. In the investigated temperature range, the relation:

77 can be used to describe the temperature dependence of the standard apparent molar volumes. Values of standard partial molar isobaric expansion coefficient (∂V 0 Φ,Gal /∂T) p are positive and decrease with increasing temperature and molalities of HCl.