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July 19

Properties of degassed water

If the water is degassed and then boiled, say, in a vacuum chamber or kettle, how the boiling process would look like without bubbles? Also, is the taste of degassed water the same as ordinary water? Thanks. 212.180.235.46 (talk) 18:08, 19 July 2022 (UTC)[reply]

Boiling would still produce bubbles; the bubbles experienced during boiling are almost entirely water vapor (i.e. H₂O gas) and not anything else. Dissolved gases may provide Nucleation sites that change the nature of the boiling; generally speaking boiling water has a tendency to "bump" when it is excessively pure and in a particularly smooth container; the "bumping" process consists of water boiling as very large, explosive bubbles rather than small bubbles. I suspect the greatest difference one would see when boiling degassed water is greater risk of bumping and less smooth boiling. (edit conflict) After you wrote your initial question you added information about a vacuum chamber. In a hard vacuum, liquid water boils at any temperature; indeed at any pressure below about 600 pascals (the pressure of the triple point of water); you can't have liquid water at equilibrium. Ice would sublime below that pressure, and liquid water will boil at any temperature. --Jayron 32 18:19, 19 July 2022 (UTC)[reply]