Graham’s Law of Effusion Effusion is the leaking of a gas through a small hole. A Hydrogen fountain illustrating the high diffusion rate of H 2 gas. Diffusion is related but not identical to effusion.
The collection of a gas over water using a pneumatic trough. This method should not be used for gases that dissolve in water (then use Hg like Priestley).
Representative partial pressures (in torr) in inhaled and exhaled air. In the respiration process, we use O2 and emit CO2 as well as humidifying the air that passes through our lungs. A corollary of Dalton’s Law is P total = X A P = mole fraction of gas A times the partial pressure of gas A