1 Kg of water is pumped to a height of 10 m, the enthalpy is changed by 50 J/Kg, and work done by the motor is 300 J/Kg, assuming a system is insulated what is the change in internal energy of water?

Topics in this quiz include: Energy balance simplifications and solving, open and closed energy balance applications, enthalpy of formation and reaction, heat of combustion and the concepts of heat merging.