Steam is the technical term for water vapor, the gaseous phase of water, which is formed when water boils. Water vapor cannot be seen, though in common language it is often used to refer to the visible mist of water droplets formed as this water vapor condenses in the presence of cooler air. Strictly speaking, in terms of the chemistry and physics, true steam is invisible. At lower pressures, such as in the upper atmosphere or at the top of high mountains water boils at a lower temperature than the nominal 100 °C (212 °F) at standard temperature and pressure. If heated further it becomes superheated steam.
The enthalpy of vaporization is the energy required to turn water into the gaseous form when it increases in volume by 1,600 times at standard temperature and pressure; this change in volume can be converted into mechanical work by steam engines and steam turbines. Steam engines played a central role to the Industrial Revolution and modern steam turbines are used to generate electricity. If liquid water comes in contact with a very hot substance (such as lava, or molten metal) it can create a steam explosion. Steam explosions have been responsible for many foundry accidents, and may also have been responsible for much of the damage to the plant in the Chernobyl accident.
Other articles related to "steam":
... The July 18, 2007 New York City steam explosion sent a geyser of hot steam up from beneath a busy intersection, with a 40-story-high shower of mud and flying debris raining down on the crowded streets ... It was caused by the failure of a Consolidated Edison 24-inch underground steam pipe installed in 1924, at 41st Street and Lexington Avenue, near Grand Central Terminal, just before 6 p.m ... The towering cloud of billowing steam, higher than the nearby 1,047-foot (319 m)-tall Chrysler Building, persisted for at least two hours, leaving a crater about 35 feet (10 m) wide and 15 feet (4 m) deep ...
... The Mallet Locomotive is a type of articulated steam railway locomotive, invented by the Swiss engineer Anatole Mallet (1837 - 1919) ... his idea combines articulation of the locomotive and compound steam use ... on a bogie frame (called a Bissell truck) the compound steam system fed steam at boiler pressure to high pressure cylinders for the main driving ...
... When coupled with Steam, it becomes easy to roll out new features ... Integral to Half-Life 2 on both the Windows and Mac platforms is the Steam content delivery system developed by Valve Corporation ... All Half-Life 2 players on PC are required to have Steam installed and a valid account in order to play ...
... portion of Half-Life 2 became available for pre-load through Steam on August 26, 2004 ... game's release date arrived, customers were able to pay for the game through Steam, unlock the files on their hard drives and play the game immediately, without having to wait for the ... Half-Life 2 was simultaneously released through Steam, CD, and on DVD in several editions ...
Famous quotes containing the word steam:
“The windows were then closed and the steam turned on. There was a sign up saying that no one could smoke, but you couldnt help it. You were lucky if you didnt burst into flames.”
—Robert Benchley (18891945)
“Now that the steam engine rules the world, a title is an absurdity, still I am all dressed up in this title. It will crush me if I do not support it. The title attracts attention to myself.”
—Stendhal [Marie Henri Beyle] (17831842)
“Blotting the sun
Stinging the eyes.
The hot seeds steam underground
—Gary Snyder (b. 1930)