CHM135H1 Lecture Notes - Lecture 11: Partial Pressure, Phase Diagram, Dynamic Equilibrium
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CHM135H1 Full Course Notes
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Chm135h1 f - lecture 11 - chapter 11 (3), chapter 12 (1) Number of evaporating molecules = number of condensing molecules - dynamic equilibrium = net number of mols in gas phase stays the same. At equilibrium, there will be a certain number of mols of gas atoms, and hence a partial pressure of the water vapor atoms - this is the vapor pressure. Imagine a threshold above which atoms possess the amount of energy required to break intermolecular bonds. Since there are more atoms that reach the threshold at higher temperatures compared to lower temperatures, there are more molecules in gas phase in higher temperature. Therefore higher temperature = more atoms enter gas phase = higher vapor pressure. Where hvap is the enthalpy required for the atoms to vaporize, and pvap is the partial pressure of the gas at that temperature. Linear function in the form of y = mx + c.
