How do you convert .75 atm to mm Hg?
So why can I make the above statement. Have I not equated units of length, millimetres, with units of pressure, force per unit area?
Well, of course I have, but why is it justifiable in this context?
It is a fact that a pressure of
Chemists routinely use mercury columns as they are a visual and convenient way to measure pressure, and it is something that could have been done 200 years ago. Of course, chemists run the risks of breaking the column and spilling the mercury, which is a major and very inconvenient cleanup job.