7. A mass of 10 kg undergoes a process during which there is heat transfer from the mass at a rate of 5 kJ/kg, an elevation decrease of 50 m, and

increase in velocity from 15 m/s to 30 m/s. The specific internal energy decreased by 5 kJ/kg and the acceleration of gravity is constant at 9.7 m/s. Determine the work for the process, in kJ.