Open AccessDielectric Relaxation and Thermodynamic Study of Caffeine-Chloroform Solution using TDR
Author(s) -
A. R. Lathi
Publication year - 2021
Publication title -
international journal for research in applied science and engineering technology
Language(s) - English
Resource type - Journals
ISSN - 2321-9653
DOI - 10.22214/ijraset.2021.37222
Subject(s) - dielectric , enthalpy , permittivity , chloroform , caffeine , thermodynamics , relaxation (psychology) , dielectric permittivity , chemistry , reflectometry , materials science , atmospheric temperature range , analytical chemistry (journal) , time domain , chromatography , physics , medicine , psychology , social psychology , optoelectronics , computer science , computer vision , endocrinology
The Complex permittivity of caffeine – Chloroform solution for different temperature and various concentrations have been measured in the range of 10MHZ to 30 GHz using Time Domain Reflectometry. From complex permittivity spectra, Static dielectric constant (εo) and relaxation time (τ) were determined using nonlinear least square fit method. Using Erying rate equation, for different molar concentration of caffeine Enthalpy of Activation ∆H and Entropy of Activation ∆S were determined.