why should low temperatures be used for products that are to be sealed using a vacuum exhaust?

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why should low temperatures be used for products that are to be sealed using a vacuum exhaust?

2007-03-19 00:09:21 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Zoology

1 answers

When something has to be hermetically sealed--vacuum has to be created, by removing the air in that closed chamber.
The process of removal, similar to evaporation, causes extreme cooling! [It is not the other way around!]
That is how Vapour-compression refrigerators, and Evaporating Plants work.

2007-03-19 00:18:35 · answer #1 · answered by thegentle Indian 7 · 0⤊ 0⤋