Aclosed system of mass 10 kg undergoes a process during which there is energy transfer by work from the system of 0.147 kj per kg, an elevation decrease of 50 m, and an increase in velocity from 15 m/s to 30 m/s. the specific internal energy decreases by 5 kj/kg and the acceleration of gravity is constant at 9.7 m/s2. determine the heat transfer for the process, in kj.

-50.005 kJ

Explanation:

Given

mass of system =10 kg

work done=0.147 kJ/kg

Change in elevation

initial velocity

Final Velocity

Specific internal Energy

from first Law of thermodynamics

where KE= kinetic energy

PE=potential energy

U=internal Energy

Q=1.47+3.375-4.850-50

Q=-50.005 kJ

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