The Physical Chemistry In Brief offers a digest of all major formulas, terms and definitions needed for an understanding of the subject. They are illustrated by schematic figures, simple worked-out examples, and a short accompanying text. The concept of the book makes it different from common university or physical chemistry textbooks. In terms of contents, the Physical Chemistry In Brief embraces the fundamental course in physical chemistry as taught at the Institute of Chemical Technology, Prague, i.e. the state behaviour of gases, liquids, solid substances and their mixtures, the fundamentals of chemical thermodynamics, phase equilibrium, chemical equilibrium, the fundamentals of electrochemistry, chemical kinetics and the kinetics of transport processes, colloid chemistry, and partly also the structure of substances and spectra. The reader is assumed to have a reasonable knowledge of mathematics at the level of secondary school, and of the fundamentals of mathematics as taught at the university level.