| Added | Thu, 27/10/2016 |
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Chemical reaction - transformation of one or more original substances (reactants) to other substances in which the nuclei of atoms do not change, thus there is a redistribution of electrons and nuclei, and the formation of new chemical substances.
Chemical reactions occur when mixing or physical contact of reagents spontaneously, when heated, the participation of catalysts (catalysis), light (photochemical reactions), electrical current (electrode processes),ionizing radiation (radiation-chemical reactions), mechanical stimuli (mechano-chemical reaction) in the low-temperature plasma (plasma-chemical reactions), etc.
As a result of chemical reacii can stand the heat form the fire, the substance can change the color and state of aggregation may occur in cooling of the surface, illumination , etc. as a result of this reaction can form toxic substances that have adverse effects on the health of living organisms and their perception.
Translated by «Yandex.Translator»
!["Fire Blizzard" [the catalytic combustion of ammonia on the oxide chromium (III)]
Translated by «Yandex.Translator»](https://ik.imagekit.io/u4ftyhke2kx/storage/tr:h-100,w-160/nt_version/1561/chemistry001.jpg?ik-sdk-version=php-2.0.0)
!["Fire Blizzard" [the catalytic combustion of ammonia on the oxide chromium (III)]
Translated by «Yandex.Translator»](https://ik.imagekit.io/u4ftyhke2kx/storage/tr:h-506,w-900/nt_version/1561/chemistry001.jpg?ik-sdk-version=php-2.0.0)
"Fire Blizzard" [the catalytic combustion of ammonia on the oxide chromium (III)]
Translated by «Yandex.Translator»
The invisible flame of burning methanol. 1981, Rick Mears, Indy 500
January 16, 2019
Author: hvr666
The shape memory effect is the phenomenon of returning to the original shape when heated, which is observed in some materials after preliminary deformation.
The shape memory effect is characterized by two values.
- The brand of the alloy with a strictly maintained chemical composition.
- Temperatures of martensitic transformations.
An example of such a material is titanium nickelide
Posted by u/Chasith
Metal memory. Items return to their original shape under heat
Author: musicaldec
I sprayed my shoes with a waterproof spray. An hour later it started to rain. I thought my garden was haunted!
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