Partial Molar Volumes and Viscosity B-Coefficients of Nicotinamide in Aqueous Resorcinol Solutions at T = (298.15, 308.15, and 318.15) K

摘要

Partial molar volumes ((φ{sub}v){sup}o) and viscosity B-coefficients for nicotinamide in (0.00,0.05,0.10,0.15, and 0.20) mol·dm{sup}(-3) aqueous resorcinol solutions have been determined from solution density and viscosity measurements at (298.15, 308.15, and 318.15) K as a function of the concentration of nicotinamide (NA). Here the relation (φ{sub}v){sup}o = a{sub}0 + a{sub}1T+a{sub}2T{sup}2, has been used to describe the temperature dependence of the partial molar volume (φ{sub}v){sup}o. These results and the results obtained in pure water were used to calculate the standard volumes of transfer A(φ{sub}v){sup}o and viscosity B-coefficients of transfer of nicotinamide from water to aqueous resorcinol solutions to study various interactions in the ternary solutions. The partial molar volume ((φ{sub}v){sup}o) and experimental slopes obtained from the Masson equation have been interpreted in terms of solute-solvent and solute-solute interactions, respectively. The viscosity data have been analyzed using the Jones-Dole equation, and the derived parameters B and A have also been interpreted in terms of solute-solvent and solute-solute interactions, respectively, in the ternary solutions. The structure making or breaking ability of nicotinamide has been discussed in terms of the sign of (δ{sup}2(φ{sub}v){sup}o/δT{sup}2)p. The activation parameters of viscous flow for the ternary solutions studied were also calculated and explained by the application of transition state theory.