CHE-1102 Lecture Notes - Lecture 2: Lead, Pressure Measurement, Blaise Pascal
Document Summary
In the late, 1500s air was considered weightless. 760 mm hg = 760 torr = 1 atm. 1 pa = 1 n/m2 or 1 kg/ (m*s2) 1 atm = 101,325 pa or 14. 70 lb/in2. 1 bar * (105 pa / 1 bar) * (1 atm / 101,325 pa) = 0. 986923 atm. Open ended manometers measure pressure relative to atmospheric pressure. If one side is lower, the lower side has more pressure. 9. 81cm * (10-2m / 1cm) * (1mm / 10-3m) * (1 atm / 760mm hg) * (101,325 pa / 1 atm) * (1 bar / 105 pa) = Pgas = patm phg 1. 00 0. 1308 bar = 0. 87 bar. In (a), 60ml of gas has a pressure: pa = 760mm hg. In (b), an additional 760mm hg was added to manometer. Pb = 760mm hg + 760 mm hg. Lord kelvin introduces the concept of absolute temperature. 0 k = lowest attainable temperature because all the energy is gone.
