Document Type


Date of Award


Degree Name

Master of Science in Chemical Engineering - (M.S.)


Chemical Engineering

First Advisor

Joseph Joffe

Second Advisor

George C. Keeffe

Third Advisor

C. L. Mantell


The effects of pressure and temperature on the isobaric heat capacity, the constant volume heat capacity, and the ratio of heat capacities of ethane are presented. The range of conditions covered are pressures from 0 to 10,000 psia and temperatures from 180 to 1400°F. The calculation of these effects is based on equations derived from the Benedict-Webb-Rubin equation of state. The derived equations express the deviations of the heat capacities from ideal gas behavior.

The results show that ignoring the effect of pressure en the heat capacities of ethane may lead to large errors in engineering calculations. Graphs and tables are presented to permit an evaluation of the heat capacities over the range investigated. Comparisons are made with data of previous investigators, and relative accuracies are discussed.



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