The book is an ideal complement to textbooks and lecture notes. It presents, explains, and describes the most important principles from all areas of process engineering (thermodynamics, momentum transfer, separation processes, reaction kinetics). Following the introductions, approximately 500 practical examples with exercises for practice, self-study, and knowledge deepening are provided, including topics such as cooling a turbine blade, mixing gas streams for optimized microorganism growth, and multi-stage compression of carbon dioxide. Many results are provided, allowing for the verification of one's own knowledge level. Due to the practical examples, the book can also serve as a valuable resource, reference work, and source of inspiration after studies, in professional life, and for experienced practitioners.