화학공학소재연구정보센터
Thermochimica Acta, Vol.525, No.1-2, 197-205, 2011
Interactions of potassium fluoride with coexistent components in water-dimethyl sulfoxide mixed solvent at different temperatures
Apparent molal volumes (V phi), apparent molal compressibilities (K phi) and viscosity A and B-coefficients of potassium fluoride in aqueous solutions of dimethyl sulfoxide (DMSO), have been evaluated at T = 303.15, 308.15, 313.15 and 318.15 K from density, velocity and viscosity data, respectively. The standard partial molal volumes (V phi(0)), standard partial molal volumes of transfer (Delta V phi(0)), standard partial molal compressibilities (K phi(0)) and standard partial molal compressibilities of transfer (Delta K phi(0)) have been determined and interpreted in terms of solute-solvent interactions. Hepler's coefficient (partial derivative(2)V phi(0)/partial derivative T(2)) and variation of B coefficient with temperature (dB/dT) have been interpreted in terms of the structure-making/structure-breaking effects of potassium fluoride in the mixture. (C) 2011 Elsevier B.V. All rights reserved.