Changes

==Etymology==

==Etymology==

[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] stem, from [http://nordan.daynal.org/wiki/index.php?title=English#ca._600-1100.09THE_OLD_ENGLISH.2C_OR_ANGLO-SAXON_PERIOD Old English] stēam; akin to Dutch stoom steam

[https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] stem, from [https://nordan.daynal.org/wiki/index.php?title=English#ca._600-1100.09THE_OLD_ENGLISH.2C_OR_ANGLO-SAXON_PERIOD Old English] stēam; akin to Dutch stoom steam

*Date: before [http://www.wikipedia.org/wiki/12th_Century 12th century]

*Date: before [https://www.wikipedia.org/wiki/12th_Century 12th century]

==Definitions==

==Definitions==

*1 : a [[vapor]] arising from a [[heat]]ed substance

*1 : a [[vapor]] arising from a [[heat]]ed substance

*2 a : the [[invisible]] vapor into which [[water]] is converted when heated to the [http://en.wikipedia.org/wiki/Boiling_point boiling point]  

*2 a : the [[invisible]] vapor into which [[water]] is converted when heated to the [https://en.wikipedia.org/wiki/Boiling_point boiling point]  

:b : the mist formed by the [[condensation]] on cooling of [[water]] [[vapor]]

:b : the mist formed by the [[condensation]] on cooling of [[water]] [[vapor]]

*3 a : water vapor kept under [[pressure]] so as to supply [[energy]] for heating, cooking, or [[mechanical]] [[work]]; also : the [[power]] so generated  

*3 a : water vapor kept under [[pressure]] so as to supply [[energy]] for heating, cooking, or [[mechanical]] [[work]]; also : the [[power]] so generated  

In common [[speech]], steam most often refers to the visible white mist that [[condenses]] above boiling water as the hot [[vapor]] mixes with the cooler [[air]]. This mist consists of tiny droplets of [[liquid]] [[water]]. [[Pure]] steam emerges at the base of the spout of a steaming kettle where there is no visible vapor.

In common [[speech]], steam most often refers to the visible white mist that [[condenses]] above boiling water as the hot [[vapor]] mixes with the cooler [[air]]. This mist consists of tiny droplets of [[liquid]] [[water]]. [[Pure]] steam emerges at the base of the spout of a steaming kettle where there is no visible vapor.

[[Pure]] steam is a [[transparent]] [[gas]]. At [[standard]] [[temperature]] and [[pressure]], pure steam (unmixed with [[air]], but in [[equilibrium]] with liquid water) occupies about 1,600 times the volume of an [[equal]] [[mass]] of liquid water. In the [[atmosphere]], the partial [[pressure]] of [[water]] is much lower than 1 atm, therefore [[gaseous]] water can exist at [[temperatures]] much lower than 100 °C (212 °F) (see [http://en.wikipedia.org/wiki/Water_vapor water vapor] and [http://en.wikipedia.org/wiki/Humidity humidity]).[http://en.wikipedia.org/wiki/Steam]

[[Pure]] steam is a [[transparent]] [[gas]]. At [[standard]] [[temperature]] and [[pressure]], pure steam (unmixed with [[air]], but in [[equilibrium]] with liquid water) occupies about 1,600 times the volume of an [[equal]] [[mass]] of liquid water. In the [[atmosphere]], the partial [[pressure]] of [[water]] is much lower than 1 atm, therefore [[gaseous]] water can exist at [[temperatures]] much lower than 100 °C (212 °F) (see [https://en.wikipedia.org/wiki/Water_vapor water vapor] and [https://en.wikipedia.org/wiki/Humidity humidity]).[https://en.wikipedia.org/wiki/Steam]

==See also==

==See also==

*'''''[http://en.wikipedia.org/wiki/Industrial_Revolution Industrial Revolution]'''''

*'''''[https://en.wikipedia.org/wiki/Industrial_Revolution Industrial Revolution]'''''

[[Category: General Reference]]

[[Category: General Reference]]