CHEM 151 Lecture Notes - Lecture 1: Molar Mass, Ideal Gas Law, Intermolecular Force
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20 Aug 2016
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Phase diagram and vapor pressure curve relationship: the phase diagram has all phases solid, liquid, and gas and the vapor pressure curve is just a zoomed in view on the line between liquid and gas. So on the vapor pressure curve liquid is on top and gas is on the bottom. The definition of vapor pressure is the pressure of the vapor over a liquid at equilibrium. Meaning that the vapor pressure is a measure of how much pressure the gas is putting on the liquid. A low vapor pressure means strong intermolecular forces and a high vapor pressure means low intermolecular forces This is because if there are more molecules of gas in the system the vapor pressure is higher, and the more gas there is the lower the strength of the intermolecular forces present in the system. High vapor pressure means the substance is volatile.
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