This is a completely updated, expanded edition of a longstanding and influential text on chemical thermodynamics. It covers the logical foundations and interrelationships of thermodynamics and their application to problems that are commonly encountered by the chemist. It features explanations of abstract concepts in a clear and simple, yet still rigorous fashion. It presents logical arrangement of the material to facilitate learning, including worked out examples. Computational techniques, graphical, numerical, and analytical, are described fully and are used frequently, both in illustrative and in assigned problems.