Liquid solution


CONCEPT OF VAPOUR PRESSURE


When a pure liquid is kept in closed vessel (in which no air is present) the liquid evaporates to give the vapours. After sometime a dynamic equilibrium is established between liquid and vapours. The pressure that the vapours exert at equilibrium on the walls of the container or on the surface of the liquid is called the vapour pressure of the liquid at that temperature, Figure (a).


Case 1:


What would happen to the vapour pressure of the liquid if we take a bigger container, Figure (b) or a wider container, Figure (c).


Key idea: When the fluid is in balance with fume, Liquid  Vapor, the Kp of the framework is Kp = Pv, where Pv is the fume pressure. We realize that Kp for a given substance harmony is a consistent and just relies upon temperature. Along these lines the fume strain of the fluid is a steady and doesn't rely upon the idea of the vessel utilized and that it just relies upon temperature. 

Case 2:

 Take a vessel with a similar fluid as on the off chance that 1 and cover it with a glass plate (of irrelevant weight) having an opening in it. Could the fume pressure be a similar at this point? 

 Key idea: Well, the fluid framework is something very similar and the temperature is additionally same. Hence the fume strain ought to be same. The fume strain of a fluid is free of the surface region uncovered on top of the fluid surface gave the surface region uncovered ought not be zero.