Mysteries of the sauna

[Dru]

it's hot in here with a fur coat on

[catbirdseat]

Air density will be about 20% less at 100C than at 20 C or equivalent to an elevation of 3000 ft.

 

Thanks. I tend to believe you because that is exactly the same answer I got by guessing. Did you use PV = nRT, or what?

Yes, since P, V, and R are constant, the change in n (number of moles of gas in the room) is proportional to the change in temperature in Kelvin units.