A closed stationery system consists of a 5 kg mass. During a certain process 50 kJ of work are done on the system and internal energy increased by 5000 J per kg. The total amount of heat exchange with the system is:

Biochemical Engineering mainly deals with the design, construction, and advancement of unit processes that involve biological organisms (such as fermentation) or organic molecules (often enzymes) and has various applications in areas of interest such as biofuels, food, pharmaceuticals, biotechnology, and water treatment processes. (Source: Wikipedia)