Heat Capacity and Phase Transitions of 2,2-Dimethyl-1,3-Propanediol Between 270 and 440K

Abstract

Abstract: The heat capacity of 2,2-dimethyl-1,3-propanediol was measured over the temperature range 270 to 440Kby means of an automated adiabatic calorimeter. Asolid-solid and a solid-liquid phase transitions were found at (314.8 ± 0.1) Kand(403.3±0.1)K.The enthalpies and entropies of these transitions were determined to be (12.41±0.1) kJ·mol^-1 and (39.4±0.3)JK-1·mol^-1 for the solid -solid transition, and(4.44 ±0.1) kJ·mol^-1 and (10.5±0.1)JK^-1·mol^-1 for the solid-liquid transition. Cp,m at 298.15Kis 183.18 JK^-1mol^-1.

Key words: 2,2-Dimethyl-1,3-propanediol, Heat capacity, Phase transition

TrendMD:

Zhang Zhiying, Zou Hong, Yang Menglin . Heat Capacity and Phase Transitions of 2,2-Dimethyl-1,3-Propanediol Between 270 and 440K[J]. Chem. J. Chinese Universities, 1988, 9(10): 1085.

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Heat Capacity and Phase Transitions of 2,2-Dimethyl-1,3-Propanediol Between 270 and 440K

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