11.1 Brownian Motion Theory
If you could look at one molecule of a gas in the middle of a container of the gas, then the one molecule will move in random directions if the temperature, pressure, and volume are constant throughout the gas.
One way to picture this from a real-life situation is if you imagine the smoke coming from a cigarette. Once the smoke gets about 6 inches above the cigarette (before this the smoke will be warm and therefore rising), then the smoke seems to dart about in random directions.
In 1827 scientist Robert Brown used a microscope to observe pollen moving in water. Albert ...
