A companion textbook for core courses in chemical engineering or in computational methods. This book takes a "nuts and bolts" approach to interactive problem solving, offering solved, partially solved, and unsolved problems in the core subject areas of chemical engineering where standard numerical methods are illustrated and where numerical solutions are typically required. The numerical techniques for problem solving discussed in the book allow students to use widely available mathematical software packages (such as POLYMATHa , Matlaba , Mathematicaa , Maplea , MathCADa ) to solve realistic chemical engineering problems much more conveniently, faster, and more accurately than with traditional problem solving techniques.