Deposition is a process in which gas transforms into solid (also known as desublimation). The reverse of deposition is sublimation. Sublimation of an element or compound is a transition from the Solid to Gas phase with no intermediate liquid stage
One example of deposition is the process by which, in sub-freezing air, water vapor changes directly to ice without first becoming a liquid. In Science, a process is every sequence of changes of a real object/body which is observable using Scientific method. For freezing as a method of food preservation see Frozen food. Temperature and layers The temperature of the Earth's atmosphere varies with altitude the mathematical relationship between temperature and altitude varies among five General properties of water vapor Evaporation/sublimation Whenever a water molecule leaves a surface it is said to have evaporated Ice is a Solid phase, usually crystalline, of a Non-metalic substance that is liquid or gas at Room temperature, such as Ammonia Liquid is one of the principal States of matter. A liquid is a Fluid that has the particles loose and can freely form a distinct surface at the boundaries of This is how snow forms in clouds, as well as frost and hoar frost on the ground. "Snowfall" redirects here For other uses see Snow (disambiguation or Snowfall (disambiguation. A cloud is a visible mass of droplets or frozen crystals floating in the atmosphere above the surface of the Earth or another Planetary body Frost is the solid deposition of Water vapor from saturated air Frost is the solid deposition of Water vapor from saturated air
Another example of physical deposition is the artificial process of physical vapor deposition, used to deposit thin films of various materials onto various surfaces. Physical vapor deposition (PVD is a variety of vacuum deposition and is a general term used to describe any of a variety of methods to deposit Thin films by the condensation Thin films are thin material layers ranging from fractions of a Nanometre to several Micrometres in thickness
Deposition releases energy and is an exothermic phase change.
| From | To | |||
| Solid | Liquid | Gas | Plasma | |
|---|---|---|---|---|
| Solid | Solid-Solid Transformation | Melting | Sublimation | - |
| Liquid | Freezing | N/A | Boiling/Evaporation | - |
| Gas | Deposition or Desublimation | Condensation | N/A | Ionization |
| Plasma | - | - | Recombination/Deionization | N/A |