H. Finke, J. F. Messerly, D. R. Douslin
Oct 1, 1976
Citations
0
Influential Citations
11
Citations
Journal
The Journal of Chemical Thermodynamics
Abstract
Low-temperature calorimetric quantities were determined for 2,3-dimethylpentane, 3,3-dimethylpentane, 2,2,3,3-tetramethylpentane, 2,2,4,4-tetramethylpentane, and 3,3-diethylpentane from 10 to about 400 K. Molar heat capacity at saturation pressure of the condensed phases, transition and melting temperatures, and enthalpies of transition and fusion were measured by adiabatic calorimetry. From the results, the thermodynamic quantities {Hs(T) − Ho(0)}, Ss, and Cs were derived and tabulated over the experimental temperature ranges of the crystalline and liquid states of each substance, and except for 2,3-dimethylpentane the standard entropies in the perfect gas state at 298.15 K were determined with the aid of literature data for vapor pressure and enthalpy of vaporization. Because, 2,3-dimethylpentane could not be crystallized, its thermodynamic properties are reported only for the glass and liquid states.