Comprehensive Study of the Thermodynamic Properties for 2-Methyl-3-buten-2-ol

Published

July 29, 2015

Author(s)

Dzmitry H. Zaitsau, Eugene Paulechka, Dzmitry S. Firaha, Andrey V. Blokhin, Gennady J. Kabo, Ala Bazyleva, Andrey G. Kabo, Mikhail A. Varfolomeev, Viktor M. Sevruk

Abstract

The heat capacity of 2-methyl-3-buten-2-ol over the interval (5 to 370) K was measured in an adiabatic calorimeter. The standard entropy and heat capacity of liquid phase at reference temperature 298.15 K were found to be Som = (232.6 ± 1.0) J·K-1·mol-1. The triple-point temperature Tfus = (245.03 +- 0.03) K and the corresponding enthalpy of fusion DcrlHom = (5.199 ± 0.012) kJ·mol-1 were also determined. The enthalpy of vaporization was determined with a Calvet-type calorimeter to be DlgHom = (46.9 ± 1.6) kJ·mol-1. The vapor pressure over temperature interval (280 to 328) K was measured with static technique. The standard entropy of vaporization at 298.15 K was found to be DlgSom = (132.6 ± 0.2) J·K-1·mol-1. The standard enthalpy of combustion for liquid 2-methyl-3-buten-2-ol DcHom(l, 298.15 K) = -(3146.4 ± 2.7) kJ·mol-1 was measured with two static-bomb isoperibol combustion calorimeters. From the experimental data, the standard enthalpies of formation for liquid and gaseous 2-methyl-3-buten-2-ol were found to be DfHom(l, 298.15 K) = -(250.3 ± 2.8) kJ·mol-1 and DfHom (g, 298.15 K) = -(202.1 ± 2.8) kJ·mol-1, respectively. The latter value was confirmed by high-level quantum chemical calculations. Molecular association in the gas phase and its effect on thermodynamic properties of the compound is discussed.

Citation

Journal of Chemical Thermodynamics

Volume

91

Pub Type

Journals

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DOI Link

Keywords

heat capacity, phase transition enthalpy, vapor pressure, hydrogen bond, standard enthalpy of formation, gas phase cluster formation

Citation

Zaitsau, D. , Paulechka, E. , Firaha, D. , Blokhin, A. , Kabo, G. , Bazyleva, A. , Kabo, A. , Varfolomeev, M. and Sevruk, V. (2015), Comprehensive Study of the Thermodynamic Properties for 2-Methyl-3-buten-2-ol, Journal of Chemical Thermodynamics, [online], https://doi.org/10.1016/j.jct.2015.07.028 (Accessed December 12, 2024)