This comprehensive book covers a broad selection of mathematical topics that are essential for a modern chemical/environmental engineer. It features a blend of analytical and numerical techniques for solving problems in diverse areas, such as, heat and mass transfer, thermodynamics, fluid mechanics, reaction engineering, transport phenomena, and process systems engineering. This new text emphasizes problem solving, and deals extensively with methods for solving systems of linear and non-linear algebraic equations, systems of linear and non-linear ordinary and partial differential equations.