In this book Chemical Engineering there are detailed discussions on mass transfer, Water Cooling and humidification, basic thermodynamics, Fluid Flow, Chemical Process Control, Process Control System variable, Control for integrated units, Model and modeling in Chemical Process, The conservation Principle, heat transfer, the Fourier law, Heat flow in a composite system, Phase equilibrium and phase diagrams etc.This book is suitable for undergraduate and postgraduate university students pursuing Chemical Engineering and as a reference textbook.