CHY 102 Lecture Notes - Lecture 8: Intermolecular Force, Torr, Gas Laws
19 Oct 2015
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At different pressures they have different boiling points. Forces between particles depend on: type of force, temperature higher tem. Ideal gas: hypothetical gases whose molecules occupy negligible space and have no interactions, and that consequently obeys the gas laws exactly, under constant temperature and pressure all gasses behave the same. 760 mm of hg = 760 torr = 1 atm =101. 3 kpa. Law: volume of a given amount of gas at constant temperature, varies inversely with applied pressure formula: p1v1= p2v2. Example: sample of helium is collected at room temperature in a 4. 5 l balloon at standard atmospheric pressure. Lord kelvin and the absolute zero reasoned that at -273 molecular motion would cease, at this temperature the ke would be zero and volume will be hypothetically zero as well. Charles" law: cooled and heated hydrogen balloons. Law: volume of a fixed mass of gas is proportional to its temperature when pressure is kept constant.
