Green Synthesis of Nanosilver Particles From Extract of Dracocephalum Lindbergii

The measurements of coppersulphate conductance have happened in binary mixed solvent with ethanol in different mass fraction 0%, 20% and 40% (w/w) (etoh- h2o) at four different temperatures from 298.15to 313.15ok (with a step of 5ok). the experimental data were obtained by using the fuoss-shedlovsky extrapolation technique. all thermodynamic parameters for association as molar conductance (λm), limiting molar conductance (λ0), walden product (λ0 η0), ion-pair association constant (ka), the activation energy for the transport process (ea) and also the standard thermodynamic parameters for association (∆goa, ∆hoa and ∆soa) were calculated. although we studied the effect of hydrogen bond formation in solution. the results showed that the association constant was increased with increasing temperature while the molar conductance and the limiting molar conductance values were decreased. furthermore, the association constant values were increased, so that the association process is endothermic.