Comment by Eisenstein

8 hours ago

I'm pretty sure it is because when there is high pressure the boiling point of water is higher.

How would that help? It never says water, always steam, and it needs to get in all crevices evenly which afaik is easier with a gas than a liquid. If the steam condenses to water (for example due to raising its boiling point above the autoclave's temperature of ~125°C) that'd probably be bad

Apparently at 2 bars, water boils at 120°C. The first temperature mentioned on Wikipedia is 121°C. That's awfully close; but elsewhere the article is quite clear about using higher-than-atmospheric atmospheric pressure. I don't see an explanation that fits all the mentioned facts

  • > If the steam condenses to water (for example due to raising its boiling point above the autoclave's temperature of ~125°C) that'd probably be bad

    If water boils at 100C then steam condenses at 99C. If water boils at 120C then steam condenses at 119C.

    > higher-than-atmospheric atmospheric pressure.

    What does that mean?

    > I don't see an explanation that fits all the mentioned facts

    Is it really a difficult concept? If the boiling point rises so does the condensation point.