Question

three characteristics of evaporation

Answer 1

The evaporation rate variation of liquids (water, ethanol) is studied versus their vapour pressure. From measurements of liquid-vapour interface displacement versus time, the state change whose rate is vo at initial time-is seen to slow down before reaching a constant rate v1 under stationary working conditions. The difference between both rates increases as pressure decreases. In addition, whereas the vo(P) curves are monotonous and increasing from saturation vapour pressure to vacuum, the v1(P) curves have a typical shape, characterised by two extremums
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