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In the first definitive book on defence mechanisms, The Ego and the Mechanisms of Defence (1936), [7] Anna Freud enumerated the ten defence mechanisms that appear in the works of her father, Sigmund Freud: repression, regression, reaction formation, isolation, undoing, projection, introjection, turning against one's own person, reversal into the opposite, and sublimation or displacement.
The term sublimation refers specifically to a physical change of state and is not used to describe the transformation of a solid to a gas in a chemical reaction. For example, the dissociation on heating of solid ammonium chloride into hydrogen chloride and ammonia is not sublimation but a chemical reaction.
Sublimation (German: Sublimierung) is the process of transforming libido into "socially useful" achievements, including artistic, cultural, and intellectual pursuits. Freud considered this psychical operation to be fairly salutary compared to the others that he identified, such as repression , displacement , denial , reaction formation ...
Displacement can also act in what looks like a 'chain reaction,' with people unwittingly becoming both victims and perpetrators of displacement. For example, a man is angry with his boss, but he cannot express this properly, so he hits his wife. The wife, in turn, hits one of the children, possibly disguising this as a "punishment ...
This causes the water vapour to change directly into a solid. Another example is the soot that is deposited on the walls of chimneys. Soot molecules rise from the fire in a hot and gaseous state. When they come into contact with the walls they cool, and change to the solid state, without formation of the liquid state.
In physics, chemistry, and other related fields like biology, a phase transition (or phase change) is the physical process of transition between one state of a medium and another. Commonly the term is used to refer to changes among the basic states of matter : solid , liquid , and gas , and in rare cases, plasma .
This free change of psychic energy is characteristic of so-called primary processes, which do not function with the aim of mental identity, but rather aim to fulfill pleasure, even self-deception to a certain extent, in order to make life easier, i.e. to avoid unpleasant and harmful things: a camouflage, reinterpretation, reconnection of ...
Outgassing is a challenge to creating and maintaining clean high-vacuum environments.NASA and ESA maintain lists of materials with low-outgassing properties suitable for use in spacecraft, as outgassing products can condense onto optical elements, thermal radiators, or solar cells and obscure them.