![]() The process is made use of industrially in combustion chemical vapour deposition. When they come into contact with the walls they cool, and change to the solid state, without formation of the liquid state. Soot molecules rise from the fire in a hot and gaseous state. This causes the water vapour to change directly into a solid.Īnother example is the soot that is deposited on the walls of chimneys. When the leaf is introduced, the supercooled water vapour immediately begins to condense, but by this point is already past the freezing point. Even though the air temperature may be below the dew point, the water vapour may not be able to condense spontaneously if there is no way to remove the latent heat. When the air becomes cold enough, water vapour in the air surrounding the leaf loses enough thermal energy to change into a solid. For deposition to occur, thermal energy must be removed from a gas. Another example is when frost forms on a leaf. This is how frost and hoar frost form on the ground or other surfaces. One example of deposition is the process by which, in sub-freezing air, water vapour changes directly to ice without first becoming a liquid. The reverse of deposition is sublimation and hence sometimes deposition is called desublimation. Water vapour from humid winter-air deposits directly into a solid, crystalline frost pattern on a window, without ever being liquid in the process.ĭeposition is the phase transition in which gas transforms into solid without passing through the liquid phase. ![]() ( January 2020) ( Learn how and when to remove this template message) ![]() Please help to improve this article by introducing more precise citations. This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. ![]()
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