Volumetric and acoustic studies of L-Citrulline in aqueous Urea and Dextrose solutions at different temperatures

Abstract

Density $\left(\rho \right)$ and speed of sound $\left(u\right)$ values of L-Citrulline in aqueous solution, 0.06 mol·kg⁻¹ aqueous Urea and aqueous 0.06 mol·kg⁻¹ Dextrose solutions have been measured at T = (288.15, 293.15, 298.15, 303.15, 308.15, 313.15 and 318.15) K within the concentration range of (0.02 to 0.2) mol·kg⁻¹.These measurements have been performed to evaluate some important parameters, viz, apparent molar volume of solute $\left(V_{\varphi }\right)$, limiting apparent molar volume of solute $\left(V_{\varphi }^0\right)$, limiting apparent molar volume of transfer $\left({\Delta }_{tr}{V}_{\varphi }^0\right)$, limiting apparent molar expansivity$\left(E_{\varphi }^0\right)$, thermal expansion coefficient (${\alpha }^{*}$), Hepler's constant $\left(\frac{{\partial }^2{V}_{\varphi }^0}{\partial T^2}\right)$, isentropic compressibility (${\kappa }_s$), apparent molar compressibility $\left(K_{s,\varphi }\right)$, limiting apparent molar compressibility $\left(K_{s,\varphi }^0\right)$, limiting apparent molar isentropic compressibility of transfer $\left({\Delta }_{tr}{K}_{s,\varphi }^0\right)$and hydration number$\left({\eta }_H\right)$ . The results have been interpreted in terms of different interactions taking place in aqueous solutions.