LAUSR

Abstract At the temperature range of (293.15, 298.15, 303.15 and 308.15) K, the speed of sound and density values for ternary solution (Niacin+ water + Ethylene glycol (EG)/Diethylene glycol (DEG)/Triethylene glycol (TEG)) were measured at atmospheric pressure and (0.02, 0.04 and 0.06) mol·kg−1 niacin concentrations. The acoustic and volumetric properties of the mixture are analyzed though the calculated parameters i.e. Apparent Molar Volume (Vϕ), Partial Molar Volume (Vϕ0) and Partial Molar Volume of transfer (ΔVϕ0), which are determined from the experimental density values and Apparent Molar Isentropic compression (Kϕ, S), Partial Molar Isentropic compression (Kϕ, S0) and Partial Molar Isentropic compression of transfer (ΔKϕ0) are calculated using the speed of sound. The pair and triplet coefficients (VAB, VABB, KAB, KABB) are calculated, using which the significant details regarding the ternary mixture from these thermodynamical parameters are reviewed in terms of (solute-solvent) and (solute-solute) interactions.