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A heated bath is used in the
A heated bath is used in the laboratory
A laboratory (; ; colloquially lab) is a facility that provides controlled conditions in which scientific or technological research, experiments, and measurement may be performed. Laboratories are found in a variety of settings such as schools ...
to allow a chemical reaction
A chemical reaction is a process that leads to the chemistry, chemical transformation of one set of chemical substances to another. When chemical reactions occur, the atoms are rearranged and the reaction is accompanied by an Gibbs free energy, ...
to occur at an elevated temperature.
In contrast to traditional Bunsen burners, heated baths use liquids to transfer heat to the reaction vessel. This is achieved using a high-boiling point liquid inside a thermally conducting bath (usually made of metal). Water
Water is an inorganic compound with the chemical formula . It is a transparent, tasteless, odorless, and Color of water, nearly colorless chemical substance. It is the main constituent of Earth's hydrosphere and the fluids of all known liv ...
and silicone oil
A silicone oil is any liquid polymerized siloxane with organic side chains. The most important member is polydimethylsiloxane. These polymers are of commercial interest because of their relatively high thermal stability and their lubricating prop ...
are the most commonly used fluids. A water bath is used for temperatures up to 100 °C. An oil bath
An oil bath is a type of heated bath used in a laboratory, most commonly used to heat up chemical reactions. It is a container of oil that is heated by a hot plate or (in rare cases) a Bunsen burner.
Use
These baths are commonly used to heat Ch ...
is employed for temperatures above 100 °C.
The heated bath is heated on an electric hot plate
A hot plate or hotplate is a heated flat surface on a stove or electric cooker on which food may be cooked, either built into an electric cooker or kitchen stove, or portable, plugged into an electric outlet.
Hot plates can also be used as a h ...
, or with a Bunsen burner
A Bunsen burner, named after Robert Bunsen, is a kind of ambient air gas burner used as laboratory equipment; it produces a single open gas flame, and is used for heating, sterilization, and combustion.
The gas can be natural gas (which is main ...
. The reaction vessel ( Florence flask, Erlenmeyer flask
An Erlenmeyer flask, also known as a conical flask (British English) or a titration flask, is a type of laboratory flask with a flat bottom, a conical body, and a cylindrical neck. It is named after the German chemist Emil Erlenmeyer (1825–190 ...
, or beaker) is immersed in the heated bath. A thermometer
A thermometer is a device that measures temperature (the hotness or coldness of an object) or temperature gradient (the rates of change of temperature in space). A thermometer has two important elements: (1) a temperature sensor (e.g. the bulb ...
is usually kept in the fluid to monitor the temperature.
See also
*Bain-marie
A bain-marie ( , ), also known as a water bath or double boiler, a type of heated bath, is a piece of equipment used in science, Industry (manufacturing), industry, and cooking to heat materials gently or to keep materials warm over a period of ...
, a.k.a. double boiler
*Heat bath
In thermodynamics, heat is energy in transfer between a thermodynamic system and its surroundings by such mechanisms as thermal conduction, radiation, electromagnetic radiation, and friction, which are microscopic in nature, involving sub-at ...
*Sand bath
A sand bath is a common piece of laboratory equipment made from a container filled with heated sand. It is used to evenly heat another container, most often during a chemical reaction.
A sand bath is most commonly used in conjunction with a ho ...
References
Laboratory equipment {{chem-stub