Engel's Physical Chemistry provides you with a contemporary, conceptual, and visual introduction to physical chemistry. The authors emphasize the vibrancy of physical chemistry today and illustrate its relevance to the world around us, using modern applications drawn from biology, environmental science and material science. The 4th Edition provides visual summaries of important concepts and connections in each chapter, offers you just-in-time math help, and expands content to cover science relevant to physical chemistry.