Viscosity and Density of Urea Dissolved in Ammonium phosphate’s solution at different temperature.

Abstract

Densities (ρ) and viscosities (η) of urea in Ammonium phosphate solution at different temperature (298.15, 303.15and308.15) K have been measured. The results were used to determine the apparent molar volumes (∅v) and limiting partial molar volumes (∅v°), slop (Sν), Gibbs energy of activation for viscous flow of solution ∆G∗1, 2 and Jones – Doles B coefficients. The results show that solvated Urea shows different types of solute – solute interactions as a result of its dissociation spatially at low concentrations. The results also show that the solvated urea has the property of breaking structure of liquid ammonium phosphate solution with increasing temperature.