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?
(a) 100 J
(b) 150 J
(c) 200 J
(d) 300 J
The question was posed to me in class test.
This key question is from Application of the Energy Balance to Open Systems topic in division Application of Energy Balances in the Absence of Chemical Reactions and Energy Balances: How to Account for Chemical Reaction of Basic Chemical Engineering