The influence of the supramolecular structure of water on the kinetics of vaporization |
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Authors: | S N Novikov A I Ermolaeva S P Timoshenkov V S Minaev |
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Institution: | 1. Moscow Institute of Electronic Engineering (Technical University), Moscow, Russia 2. Malinin Materials Science Research Institute, Moscow, 103460, Russia
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Abstract: | The kinetics of water vaporization was studied gravimetrically using a Q-1500 D derivatograph with an accuracy of ±5 × 10?5 g under atmospheric conditions. Various supramolecular structures were created in liquid water using solutions of K, Na, Ba, and Zn chlorides with various concentrations. The kinetic dependences of weight P loss caused by the vaporization of solutions were compared with the data on pure water used to prepare the solutions. The dependence of the rate of vaporization V on the concentration of hydrated ions in solutions was used to show that the rate V is the sum of the rates of vaporization of particles of two types, (a) H2O molecules and (b) supramolecular formations (H2O clusters) with H-bonds. As a consequence, a nonlinear (piecewise linear) dependence of the kinetics of vaporization P = f(τ) of water and solutions is observed. The rate of vaporization (V 1) along the initial P = f(τ) curve portions is substantially (by ~30%) higher than its stationary value (V). |
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