Difference between revisions of "Steam"
From Nordan Symposia
Jump to navigationJump to searchm (Text replacement - "http://" to "https://") |
|||
| (One intermediate revision by the same user not shown) | |||
| Line 2: | Line 2: | ||
==Etymology== | ==Etymology== | ||
| − | [ | + | [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 [ | + | *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 [ | + | *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 | ||
| Line 17: | Line 17: | ||
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 [ | + | [[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== | ||
| − | *'''''[ | + | *'''''[https://en.wikipedia.org/wiki/Industrial_Revolution Industrial Revolution]''''' |
[[Category: General Reference]] | [[Category: General Reference]] | ||
Latest revision as of 02:15, 13 December 2020
Etymology
Middle English stem, from Old English stēam; akin to Dutch stoom steam
- Date: before 12th century
Definitions
- 1 : a vapor arising from a heated substance
- 2 a : the invisible vapor into which water is converted when heated to the boiling point
- 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
- b : active force : power, momentum <got there under his own steam> <sales began to pick up steam>; also : normal force <at full steam>
- c : pent-up emotional tension <needed to let off a little steam>
- 4 a : steamer 2a b : travel by or a trip in a steamer
Description
Steam is either mist (as seen from a kettle), or the gas phase of water (water 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 water vapor and humidity).[1]
