scope:

PREFACE

In 1975, using all the new data and correlations available, the Data Book project in the Department of Chemical Engineering at The Pennsylvania State University revised and extended Chapter 7. During the past three years, additions and updates have been carried out resulting in this revised chapter. A major change is the adoption of international enthalpy and entropy bases of the ideal gas at absolute zero temperature and one atmosphere pressure. Detailed results of the evaluations are available in Documentation Report No. 7-90 from Xerox University Microfilms, Ann Arbor, Michigan.

Work on this chapter was carried out by Kirk R. Hanawalt and Gurmeet Singh, Research Assistants in Chemical Engineering, under the supervision of Dr. Thomas E. Daubert. The chapter task force for the Technical Data Committee was B. I. Lee, Mobil Oil, Chairman; D. L. Embry, Phillips Petroleum; and C. F. Spencer, M. W. Kellogg.