heated under pressure
...that the physical and chemical properties of water are markedly different when it is heated under pressure at temperatures between 100 and 374°C?
...that the <a href="./Physical_property" id="mwELE" rel="mw:WikiLink" title="Physical property">physical</a> and <a class="mw-redirect" href="./Chemical_properties" id="mwELI" rel="mw:WikiLink" title="Chemical properties">chemical properties</a> of <a href="./Water" id="mwELM" rel="mw:WikiLink" title="Water">water</a> are markedly different when it is <b id="mwELQ"><a href="./Superheated_water" id="mwELU" rel="mw:WikiLink" title="Superheated water">heated under pressure</a></b> at temperatures between 100 and 374°C?