Wikipedia:Reference desk/Archives/Science/2022 July 19

= 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)
 * 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.  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)