پديدآورندگان :
Zabihi Fatemeh fatemeh_zabihi77@yahoo.com Department of Physic, Faculty of Science, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran; Tel: 09380113671; E-mail: , Kiani Farhoush farhoush_kiani@yahoo.com Department of Chemistry, Faculty of Science, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran; E-mail: , Yaghobi Mojtaba Department of Physic, Faculty of Science, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran , Shahidi Seyed Ahmad sashahidy@yahoo.com Department of Food Science and Technology, College of Agriculture and Food Science, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran; E-mail:
كليدواژه :
Glycyl Aspartic Acid , Acid Dissociation Constant , Thermodynamic Properties , GibbsFree Energy , Enthalpy , Entropy
چكيده فارسي :
In this research work, potentiometric technic was used to measure acidic dissociate constant of glycyl aspartic acid (GLY-ASP) at temperature 25, 30, 35, 40, 45°C and in 0.1 mol/l ion strength of chloride sodium. Using this data, we calculated the thermodynamic properties of Gibbs free energy (ΔG), enthalpy (ΔH), and entropy (ΔS) GLY-ASP. All analyses on data were studied in pH=1.5-11 and in the aqueous solution. Results indicates that the value of ΔG increases by temperature growth regarding, and ΔS is negative and ΔH value is negative for the first and second ionization and positive for the third ionization.
