chemical physics. A branch of chemistry that studies chemical phenomena from a physical and mathematical perspective. Physical chemistry includes chemical thermodynamics, kinetics, spectroscopy, quantum chemistry, and statistical mechanics.

the study of the theoretical basis of chemical behavior, relying on mathematics and physics.

application of physical theories or laws to explain results of chemistry experiments

The branch of chemistry concerned with the dependence of physical properties on chemical properties and the physical changes occurring during chemical reactions.

the branch of chemistry dealing with the physical properties of chemical substances

Physical chemistry is the application of physics to macroscopic, microscopic, atomic and particulate phenomena in chemical systemswithin the field of chemistry traditionally using the principles, practices and concepts of thermodynamics, quantum chemistry, statistical mechanics and kinetics.Quantum Chemistry (p3 - "PHYSICAL CHEMISTRY"), states that "We can divide physical chemistry into four areas: thermodynamics, quantum chemistry, statistical mechanics and kinetics". It is mostly defined as a large field of chemistry, in which, several sub-concepts are applied; the inclusion of quantum mechanics is used to illustrate the application of physical chemistry to atomic and particulate chemical interaction or experimentation Physical Chemistry (p3 - "PHYSICAL CHEMISTRY"), states that the field of physical chemistry is concerned with the microscopic and the macroscopic phenomenon which are mostly concerned with thermodynamics, and kinetics; the field of atomic and particulate interaction being included is implied with the inclusion of quantum chemistry..