A. Singh
Feb 2, 2017
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Abstract
Present communication reports the experimental values of the dielectric relaxation time ( ) of 4 Methoxyaniline, 4 Ethoxyaniline, 2 Nitroaniline, 2 Chloro, 4 Nitroaniline, 2,6 Dichloroaniline and 2 Methoxy, 3 Nitroanilinein dilute solution of benzene at wavelength 3.13 cm in the microwave region. The measurements have been made at 293, 303 and 313 0 K, in order to calculate the free energy of activation for dipole orientation process ( F ). The experimental values of have been correlated with the calculated value of obtained using different theories of dielectric relaxation time ( ). It is concluded from this comparative study that the Murty equation is a better representation of the dielectric relaxation phenomenon. Thermo dynamical parameters like molar free energy of activation ( F ), molar enthalpy of activation ( H ) and molar entropy of activation ( S ) have been evaluated by considering the relaxation as the rate process. From the values of F for the various compounds