When the liquid in the packaging containers open and leave the area for a period of time, the liquid terrain possible, but if the packaging of a liquid in a closed container at the same temperature. The molecules of the liquid that terrain will remain in the space above the liquid. The molecule is in the form of steam collide itself, or bump the container walls. A lot of vapor molecules collide with the container walls all the time, cause the load per container or pressure occurs in the container, while leoklai is an. The volume of liquid is reduced, but the volume of steam will rise above the vapour pressure of the working fluid, increasing at the same time, some steam, it will change the status back to liquid again. Initially, the rate of change from liquid to vapour is slowly but gradually increased as the number of molecules of a vapor rises more. To change the status back to between liquid and vapour occurs continuously until the rate of change from the liquid equal to the rate of change of a liquid. As a result, making the total number of molecules of vapor condensation as liquid molecules. This volume, and the vapour pressure of the liquid is, the constant pressure of the Vapor above the liquid, while the rate of evaporation of the condensate is also called a vapor pressure of the liquid.
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