Mass and energy balance calculations are the fundamental components in the design and development of chemical process industries. Mass balance calculations are performed to determine the yields of main products, byproducts, consumption of raw material, and production losses. Only when the mass balance is performed, can the process engineer make the calculations required for the design of production equipment. Energy balance involves the computation of inputs and outputs of energy in equipment. The energy balance is performed from material balance, taking into account the thermal effects (exothermic or endothermic) of reactions and the physical transformations (evaporation, crystallization) occurring in the process equipment. This book includes problems and solutions in material and energy balance in process equipment. These are followed by energy balance problems. All problems assume a steady-state system. The number and variety of problems included is extensive. The problems are organised according to subject matter. It is possible for answers to differ slightly due to different sources of data. The book will be of real value in process calculation classes, and can also serve as a refresher for practising engineers.