Ethylene, heat capacity calculation

The calculation of the factor (ey/ar)8, SaC T may be illustrated by the example used in Section II, the catalytic oxidation of ethylene. The two modes of oxidation of ethylene are used as the key reactions, and ethylene oxide and carbon dioxide are selected as the key components. The reactions and the corresponding stoichiometric matrices are shown in Section II. In the range of temperature between 200° and 350 0., the heat capacities of the reactants are nearly enough linear functions of the temperature, and accordingly the product S CPT, the matrix of changes of heat capacity for the key reactions, will be a linear function of the temperature. The matrix is found to be... 

Fig. IS. Comparison of cakmbted and measured ideal heat capacity of ethylene. Dadied curve calculated with vibrational frequencies taken from Ref. ) Solid curve calculated with frequencies taken firom Ref. ) experimental results Rrf. Q expoimaital results Ref. (Reproduced psmission from Mehl and Moldover "i)...

Tungusov and Mishchenko have measured the heat capacities of pure ethylene glycol and solutions of Nal and K1 in ethylene glycol and calculated the partial molal heat capacity from the data. They report a value of 21.5 cal mol for Nal and conclude that Cp is independent... 

Din was the editor of a series of books designed to provide reliable thermodynamic data for industrially important gases. Temperature-entropy diagrams were chosen as the most generally useful graphical presentations and these are supplemented by tables of entropy, enthalpy, volume, heat capacity at constant pressure and at constant volume, and Joule-Thomson coefficients. Unfortunately, there is no consistency in the choice of units, although the thermochemical calorie is employed. The report on each substance (i.e. ammonia, carbon dioxide, carbon monoxide, air, argon, acetylene, ethylene, and propane) consists of a brief introduction, a survey of experimental data, a description of methods used for the thermodynamic calculations, and a set of tables. 

Table III.30. Calculated and measured heat capacities of a 31% propylene copolymer of ethylene and propylene in cal deg mole ...

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