Steam is water in the gas phase, which is formed when water boils. Steam is invisible; however, "steam" often refers to wet steam, the visible mist or aerosol of water droplets formed as this water vapor condenses. 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 1,700 times at standard temperature and pressure; this change in volume can be converted into mechanical work by steam engines such as reciprocating piston type engines and steam turbines, which are a sub-group of steam engines. Piston type steam engines played a central role to the Industrial Revolution and modern steam turbines are used to generate more than 80% of the world's electricity. If liquid water comes in contact with a very hot surface or depressurizes quickly below its vapor pressure, 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 disaster.

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  1. Ura-Ki

    Steam up power fest, any one going this year?

    It's that time again, I missed the last few years, and will not be displaying my Caterpillar, but will be going at least for two days this year! Hope to see you there!
  2. RicInOR

    Oregon Steam Up Last Weekend July / First August 2018

    Steam-Up July 28-29 and August 4-5, 2018 Just off I-5 Near Salem. Hint, take an exit south of the event and use surface streets to get to parking, or expect to be in the crowd along I-5.
  3. RicInOR

    Trucks and Steam -

    Brooks Oregon ( Just North of Salem, just off I-5) Aug 26/27 Truck Show Pacific NW Truck Museum Essentially next door Antique Powerland Antique Powerland Grab the kids, grand kids, grandpa and have a fun & educational time. You can always head to the State Fair afterwards
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