CHEM 102 Lecture Notes - Lecture 18: Kinetic Theory Of Gases, Ideal Gas, Jmol
5 Apr 2016
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A sample of solid kclo3 was heated and decomposed: 0. 650 l of o2 was collected over water at 22oc and 754 torr. The vapor pressure of water torr = 1 atm. Ptotal = partial pressure of o2 + partial pressure of h2o. 754 torr = p of o2 + 21 torr. P of o2= 733 torr = 0. 964 atm. Particles are in constant random motion i. ii. Collisions of the particles with the walls of the container gives rise to pressure. Gases are mostly empty space (volume of particles is assumed to be negligible) Average kinetic energy of a gas is proportional to its absolute temperature. Root mean square velocity of a gas ter at 22oc is 21 torr. ^ in kg/mol (at the same t; lighter gases travel faster) Effusion: one gas that escapes through a pinhole through a vacuum. Low pressure: few gas particles (mostly empty space)
