When we boil a kettle, we observe what scientists call a phase transition: the water changes from being a liquid to a gas as water becomes less dense. One litre of water boils to give about 1,000 litres of steam at atmospheric pressure.
via LiveScience.com http://ift.tt/1kGBwXp
via LiveScience.com http://ift.tt/1kGBwXp
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