This book is a comprehensive summary of chemical courses and seeks to synthesize chemical processes principles and phenomena applicable in homogenous and heterogeneous systems in the choice of process route, reactors selection and processes designs. It is a handbook for Chemists and Chemical Engineers because of it extensive and concise presentation of the definitions of the fundamental chemical processes principles and their applications in understanding chemical processes dynamics. Much emphasis is placed in defining the effects of these principles in sustainability of production processes. It is a must have for engineering students and practicing Engineers.