Physical chemistry refers to that branch of chemistry which combines physical and chemical studies to deduce the physical properties of molecules and how these affect their chemical properties and bonding characteristics. It collaborates many branches like electrochemistry which studies the ways ions, electrons bond under electrical current, thermochemistry which is the study of why heat is produced in a reaction, spectroscopy which refers to the study of radiation emitting matter and chemical kinetics which is the study of the speed of a chemical reaction, etc. This book provides comprehensive insights into this field. It gives detailed explanations of all the various branches of this subject and their applications. It presents researches and studies performed by experts across the globe. In this book, using case studies and examples, constant effort has been made to make the understanding of the difficult concepts of physical chemistry as easy and informative as possible, for the readers. It will prove to be a beneficial reference guide for researchers and students alike.