CHM 1045 Chapter Notes - Chapter 11: Atmospheric Pressure, Ideal Gas Law, Mole Fraction
Document Summary
Substances that are liquids or solids under ordinary conditions may also exist as gases. Highly compressible and occupy the full volume of their containers. When subjected to pressure, their volume decreases. Always form homogenous mixtures with other gases. Particles occupy a small fraction of the total volume of their containers. Pascal (1 n/m^2) pa 101,325 pa at sea level. Pounds per square inch psi 14. 7 psi at sea level. Torr (1 mmhg) torr 760 torr at sea level. Inches of mercury in hg 29. 92 in hg at sea level. Atmosphere atm 1. 00 atm at sea level. Standard temperature pressure (stp) 0 degrees celsius 1 atm. The volume of a gas at constant temperature and pressure is directly proportional to the number of moles of gas. The total pressure of a mixture of gases equals the sum of the pressures that each would exert if it were present alone. X1= mole fraction= moles of 1/ total moles.