There are two WileyPLUS platforms for this title, so please note that you should purchase this version if your course code is a 6 digit numerical code. This packages includes a loose-leaf edition of Elementary Principles of Chemical Processes, 4th Edition, a WileyPLUS registration code, and 6 months access to the eTextbook (accessible online and offline). For customer technical support, please visit http://www.wileyplus.com/support. WileyPLUS registration cards are only included with new products. Used and rental products may not include valid WileyPLUS registration cards. Elementary Principles of Chemical Processes, 4th Edition prepares students to formulate and solve material and energy balances in chemical process systems and lays the foundation for subsequent courses in chemical engineering. Thetext provides a realistic, informative, and positive introduction to the practice of chemical engineering.