PHRM3021 Lecture Notes - Lecture 10: Vapor Pressure, Brownian Motion, Ideal Gas
Document Summary
A suspension of small solid particles or droplets suspended in a gas or vapour. Stable or unstable: smoke, fog, drizzle, snow, etc. Dispersion of a powder or liquid in a gas: 2. Evaporation of volatile substances which condense to form droplets or fine particles upon cooling to ambient temperature. Compressed gases co2, n2, no2 sprays and foams: fill spaced of displaced solid i. e. less pressure less dose. Liquefied gases vapour pressure is maintained at constant temperature i. e. fluorinated and fluoro-chlorinated hydrocarbons gases at ambient temperatures and pressures. Liquefied gases vapour pressure is maintained at constant temperature i. e. fluorinated and fluoro-chlorinated hydrocarbons gases at ambient temperatures and pressures i. e. packaged at 3-5 times atm. Normally in range 1-10 micro meters: > 5 micro meters inertial impaction, 1 5 micro meters sedimentation, < 1 micro meters brownian movement. Impaction against the bend (pharynx: over 10 micro meters (nasal, over 15 micro meters (mouth) i. e. does not reach the pharynx.
