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I'm suddenly curious about the freezing temperature of water or vapour to
ice. With decreasing ambient pressure such as when climbing to altitude the
boiling point of water  lowers. Such that at the top of Mt Everest it's not
possible to boil an egg. I have a vacuum pump that will suck down to 1/2000
of atmospheric pressure, when experimenting and pulling a hard vacuum  on
water at approx 25'C it boils and gets very cold  and turns to ice rapidly.
Obviously with decreasing pressure (ie Altitude) the boiling point lowers,
but what about the freezing point? Does any one have any data on this?

Just curious

Roberto d'Australia.

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