Thermodynamic Quantities of Surface Formation of Aqueous Electrolyte Solutions: II. Mixed Aqueous Solutions of NaCl and MgCl2

• Published in: Journal of colloid and interface science Vol. 209; no. 2; pp. 403 - 407
• Main Authors: Matubayasi, Norihiro, Yamaguchi, Shin-ichiro, Yamamoto, Kazuo, Matsuo, Hideyuki
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 15.01.1999; Elsevier
• Subjects: Chemistry; electrolytes; Exact sciences and technology; Gas-liquid interface and liquid-liquid interface; General and physical chemistry; magnesium chloride; mixture of salts; salts; sodium chloride; Solution properties; Solutions; Surface physical chemistry; surface tension; electrolytes; magnesium chloride; surface tension; mixture of salts; salts; sodium chloride; Lanthanum chloride; Surface reaction; Electrolyte solution; Thermodynamic parameter; Concentration effect; Temperature effect; Magnesium chloride; Surface tension; Aqueous solution; Experimental study; Sodium chloride; Inorganic compound
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1006/jcis.1998.5929

The surface tensions of binary salt mixtures made up from NaCl and MgCl2in aqueous solution were measured as a function of concentration and temperature. By analyzing the results, the thermodynamic quantities of surface formation such as entropy (Δs), Helmholtz free energy (Δf), and energy of surface formation (Δu) were evaluated. The Δfof the mixtures positively deviates from the straight line connecting those of NaCl and MgCl2aqueous solutions. On the other hand, Δsshows negative deviation from the linear relation.