An analysis is made of the high entropy of fusion of long chain paraffins attributing that entropy to the onset at melting of freedom of the molecule to undergo hindered rotation about each carbon to carbon bond. The theoretical results are compared with the experimental observations. The entropy of fusion of heavy paraffins yields information concerning the rotational energy levels of the molecules. An empirical relationship is stated connecting the energy levels of the molecule with the melting tem?perature of the molecule.
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