Theory of the Earth Don L. Anderson Chapter 5. Thermodynamics and Equations of State Boston: Blackwell Scientific Publications, c1989 Copyright transferred to the author September 2, 1998. You are granted permission for individual, educational, research and noncommercial reproduction, distribution, display and performance of this work in any format. Recommended citation: Anderson, Don L. Theory of the Earth. Boston: Blackwell Scientific Publications, 1989. http://resolver.caltech.edu/CaltechBOOK:1989.001 A scanned image of the entire book may be found at the following persistent URL: http://resolver.caltech.edu/CaltechBook:1989.001 Abstract: The total energy contained in a system, such as a mineral, is called the internal energy, U, and includes the kinematic and potential energy of all the atoms. It depends on temperature, pressure and position in the field of gravity.