Physical chemistry is the study of macroscopic, atomic, subatomic 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 chemistry in contrast to chemical physics, is predominantly (but not always) a macroscopic or supramolecular science, since most of the principles on which it was founded are related to the massive structure and not only molecular / atomic (for example, chemical equilibrium and colloids).
Some of the relationships that physical chemistry strives to solve include the effects of:
1. Intermolecular forces that act on the physical properties of materials (plasticity, tensile strength, surface tension in liquids).
2. Kinetics of reaction on the speed of a reaction.
3. The identity of the ions and the electrical conductivity of the materials.
4. Surface science and cell membrane electrochemistry.
5. Interaction of one body with another in terms of quantities of heat and work called thermodynamics.
6. Heat transfer between a chemical system and its environment during the phase change or chemical reaction called thermochemistry
7. Study of the colligative properties of the number of species present in the solution.
8. The number of phases, the number of components and the degree of freedom (or variance) can be correlated with each other with the help of the phase rule.
9. Reactions of electrochemical cells.