eng Ansari Education and Research Society Journal of Ultra Chemistry 0973-3450 2319-8036 September, 2017 13 5 121 124 http://dx.doi.org/10.22147/juc/130505 567 article ARJUMAN BANO 1 A.K. SINGH (anilkumar2_singh@yahoo.com) 1 Department of Chemistry Teerthanker Mahaveer University, Moradabad (India) <p style="text-align: justify;">The rate of alkaline hydrolysis of ethyl nicotinate was measured over the temperature range of 20oC to 40 oC in water-ethanol mixture at different composition 30 to 70% (v/v). The influence of solvent variation on reaction rate was examined in term of changes in the Activation parameter .increase of H* and S* values with simultaneous increase in G* of the reaction in media, reveals that the reaction is Enthalpy controlled and Entropy domination.<br /> The Values of Iso-kinetic which is equal to 360, clearly indicates that there is appreciable interaction between solvent and solute present in the reaction media, i.e. reaction is ion-dipole.</p> https://journalofchemistry.org/paper/567/ Activation Parameter solvent-solute interaction Iso-kinetic temperature specific solvation Ethyl nicotinate