Introduction to Chemical Thermodynamics is a book which introduces the concept of thermodynamics including the history, the laws, chemical thermodynamics and its origin and principles of chemical thermodynamics. The laws and the concept of chemical energy in the chemical thermodynamics have been discussed in this book. This book aims to provide insights about the thermodynamics equilibrium, the thermodynamics of chemical mixtures and the biological systems with respect to chemical thermodynamics to the readers. This book provides description about the application of chemical thermodynamics and the future of chemical engineering in relation to chemical thermodynamics.