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Cooking an egg white is a chemical reaction where the protein is denatured by he heat and turns from clear to white.
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Chemical reactions may be classified in different ways depending on the aspect being considered and on the branch of chemistry. Some examples of widely used terms for describing common kinds of reactions are:
Isomerisation, in which a chemical compound undergoes a structural rearrangement without any change in its net atomic composition; see stereoisomerism
Direct combination or synthesis, in which two or more chemical elements or compounds unite to form a more complex product:
N2 + 3H2 → 2NH3
Chemical decomposition or analysis, in which a compound is decomposed into smaller compounds or elements:
2H2O → 2H2 + O2
Single displacement or substitution, characterized by an element being displaced out of a compound by a more reactive element:
2Na + 2HCl → 2NaCl + H2
Double displacement or coupling substitution, in which two compounds in aqueous solution (usually ionic) exchange elements or ions to form different compounds:
NaCl + AgNO3 → NaNO3 + AgCl
Combustion, in which any combustible substance combines with an oxidizing element, usually oxygen, to generate heat and form oxidized products. The term combustion is used usually only large-scale oxidation of whole molecules, i.e. a controlled oxidation of a single functional group is not combustion.
C10H8+ 12O2 → 10CO2 + 4H2O
CH2S + 6F2 → CF4 + 2 HF + SF6
Some branches of chemistry include any minor changes in chemical conformation in the reaction types, while others consider these changes merely as physical properties of a compound.
The collision of more than two particles into the ordered structure necessary to perform chemical transformations is extremely unlikely; which is why ternary reactions in practice are not observed. A chemical reaction may require three or more reagents, but the process can generally be decomposed into a stepwise series or a set of stepwise reactions of the above.
The large diversity of chemical reactions makes it difficult to establish simple criteria for functional (as opposed to mechanistic) classification. However, some kinds of reactions have similarities which make it possible to define some larger groups. A few examples are:
Organic reactions encompass several different kinds of reactions involving compounds which have carbon as the main element in their molecular structure. These reactions occur mostly according to, within, by, or via functional groups.
Petrochemical reactions are often distinguished from other organic reactions.
Redox reactions involve augmenting or decreasing the electrons associated with a particular atom. according to its oxidation number.
Combustion, in which a substance reacts with an oxidizing element, such as oxygen gas.
Reactions are also classified according to their mechanism:
Reactions of ions, e.g. disproportionation of hypochlorite
Reactions with reactive ionic intermediates, e.g. reactions of enolates
Radical reactions, e.g. combustion at high temperature
Reactions of carbenes
Here is a good place to look.
http://www.usoe.k12.ut.us/curr/science/s...
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