Ryk writes:

Actually PV = nRT is just an equation of state for an ideal gas that
would be equally at home in either a thermo or a chem text book.

If there are any meaningful definitions of "chemistry", "thermodynamics",
and "physics" anymore, then PV = nRT belongs in the second, which is a
branch of the third. But this is a philosophical quarrel that we'll not
solve here.

All I know is, there ain't no oil in my raw shop air, hot as it may be.
And certainly not compared to proximity to my 2-stroke outboard, 2-stroke
chain saw, 2-stroke string trimmer, or 2-stroke Weber charcoal grill.