CHEM 120 Lecture Notes - Lecture 1: Total Pressure, Hyperoxia, Closed System

• School: McGill University
• Department: Chemistry
• Course: CHEM 120
• Professor: Laura Pavelka

Document Summary

Equations/units: density= mass/volume: =m/v: g/cm3, pressure: force/area: pascals=n/m2, force(n)=m*gravity (down, g = 9. 8 m/s2= (9. 8 m/s2)(1 n/1 kg*m/s2) = 9. 8 n*kg, cylinder: volume= a*h mass=v* or (a*h* ) 300k and atmospheric pressure: densitysol/liq = m/v approx. g/cm3, densitygas =m/v approx. mg/cm3; gas densities are strongly dependent on. Gas pressure and how it is measured: pressure: confined gases exert pressure and are detected as an outward force o. Gravitational acceleration(at sea level): g: example: a 102 g object experiences a gravitational force of 1. N, if this force is spread over an area of 1 m2, the pressure is 1 pascal. The green cylinder exerts more pressure over its lower surface, (both have the same mass) ((smaller area, so lower pressure, think radius): barometric/atmospheric pressure. N2, o2, ar, co2, h2o, so2, no2, etc, 10 000kg (10 340)of mass of air for each 1 m^2. Force exerted by this mass: (f=m*g) 101,300n.