2-40 Water is being heated in a closed pan on top of a range while being stirred by a paddle wheel. During the process, 30 kJ of heat is transferred

to the water,and 5 kJ of heat is lost to the surrounding air. The paddle-wheel work amounts to 500N-m. Determine the final energy of the system if its initial energy is 12.5 k Answer: 38.0 kJ