Physical chemistry is the study of macroscopic, and particulate phenomena in chemical systems in terms of the principles, practices, and concepts of physics such as motion, energy, force, time, thermodynamics, quantum chemistry, statistical mechanics, analytical dynamics and chemical equilibrium.Physical chemists predict properties and reactions of chemicals, then test and refine those predications. They use mathematical analysis and statistics on huge datasets, sometimes with millions of data points, to reveal hidden information about compounds, materials, and processes. Physical chemistry is the branch of chemistry that deals with the physical structure of chemical compounds, the way they react with other matter and the bonds that hold their atoms together.