Topics In Physical Chemistry
Topics In Physical Chemistry CHM 37000
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This 1 page Class Notes was uploaded by Austen Pollich on Saturday September 19, 2015. The Class Notes belongs to CHM 37000 at Purdue University taught by Garth Simpson in Fall. Since its upload, it has received 55 views. For similar materials see /class/207963/chm-37000-purdue-university in Chemistry at Purdue University.
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Date Created: 09/19/15
3a The assumption here is that molecular vibration and crystal cell vibration can be decoupled Mathematically it means the total partition functions is a product of partition function of the cell 2 and the molecular partition function Q ZNqCHA where qCH4 is a molecular partition function which we will only consider the vibration 1 9 contribution Therefore Qcan be written as Q illHm 1 6 12 9 1 1 kT3 3b ncludin rotation contribution 2No l g Q H1 eW 039 BABBBC 6U 6 In Rotation contribution of CV can be calculated from Cvm 6T and Um kTZ As a result 3 Cvm ER This derivation is valid when the free rotation can be assumed CH4 has a weak intermolecular interaction so that the molecules can assume rotate freely 3 At high temperature limit Cvm ER temperature independent
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