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boiling

Boiling is the rapid vaporization of a liquid, which occurs when a liquid is heated to its boiling point, the temperature at which the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere. There are two main types of boiling: nucleate boiling where small bubbles of vapour form at discrete points, and critical heat flux boiling where the boiling surface is heated above a certain critical temperature and a film of vapor forms on the surface. Transition boiling is an intermediate, unstable form of boiling with elements of both types. The boiling point of water is 100 °C or 212 °F but is lower with the decreased atmospheric pressure found at higher altitudes.
Boiling water is used as a method of making it potable by killing microbes and viruses that may be present. The sensitivity of different micro-organisms to heat varies, but if water is held at 100 °C (212 °F) for one minute, most micro-organisms and viruses are inactivated. Ten minutes at a temperature of 70 °C (158 °F) is also sufficient for most bacteria.
Boiling water is also used in several cooking methods including boiling, steaming, and poaching.

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  1. U

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    For the past couple of months the water coming out of our hot taps has been boiling. At first we thought nothing of it. However we've now been hit with a £1600 gas bill. Just before it started I think I fiddled with a switch on the mid-position actuator (we had no hot water at all. Turned out...
  2. A

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  3. R

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  4. V

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  5. Simon F

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  6. C

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  7. Chalked

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  8. W

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  9. O

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  10. R

    Promax 28 boiling when hot water is used?????????

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  11. Chalked

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  12. V

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  13. K

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  14. G

    So next time you're boiling lobster alive.....

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  15. T

    Replacing Plastic Insert on Radiator Bracket

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  16. U

    Balancing problem!

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  17. B

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  18. D

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  19. D

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  20. J

    Kitchen radiator boiling hot CH turned off... Help?!

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