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Heat capacity and an incommensurate phase transition of crystalline bis(4-chlorophenyl)sulfone

✍ Scribed by Toshiaki Tanaka; Tooru Atake; Hirokazu Nakayama; Taro Eguchi; Kazuya Saito; Isao Ikemoto

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 250 KB
Volume: 26
Category: Article
ISSN: 0021-9614
DOI: 10.1006/jcht.1994.1140

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✦ Synopsis

The heat capacity of crystalline bis(4-chlorophenyl)sulfone was measured from the temperature (T=14) to (T=300 \mathrm{~K}) by adiabatic calorimetry. An incommensurate phase transition was detected as a second-order type of heat-capacity anomaly at (T=(148.5 \pm 0.5) \mathrm{K}). The molar enthalpy and the molar entropy of transition were ((43.1 \pm 0.1) \mathrm{J} \cdot \mathrm{mol}^{-1}) and ((0.314 \pm 0.005) \mathrm{J} \cdot \mathrm{K}^{-1} \cdot \mathrm{mol}^{-1}), respectively. Some thermodynamic functions were calculated from the heat-capacity results and the values were tabulated.

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