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Thermodynamic function of valineacid in n-n dimethyl formamide mixtures from conductance measurement | ||
| Baghdad Science Journal | ||
| Article 1, Volume 10, Issue 4, 2013, Pages 1172-1181 | ||
| Author | ||
| Sanaa T.Sarhan | ||
| Abstract | ||
| Some physical properties enthalpy (ΔH), entropy (Δs), free energy (ΔG),capacities(Δcpₒ) and Pka values) for valine in dimethyl foramideover the temperature range 293.15-318.15K, were determined by direct conductance measurements. The acid dissociation at six temperature was examined at solvent composition x2) involving 0.141 of dimethyl foramide . As results, calculated values have been used to determine the dissociation constant and the associated thermodynamic function for the valine in the solvent mixture over temperatures in the range 293.15-318.15 k. The Pka1, and Pka2 were increased with increasing temperature. | ||
| Keywords | ||
| valine; Dimethyl formaide; Thermodynamic function; conductance measurement | ||
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