Question

Helium gas is throttled steadily from 400 kPa
and 60C. Heat is lost from the helium in the amount of
1.75 kJ/kg to the surroundings at 25C and 100 kPa. If the
entropy of the helium increases by 0.34 kJ/kg·K in the valve,
determine (a) the exit pressure and temperature and (b) the
entropy generation during this process.

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Science
Physics

Thermodynamics

Heat Transfer

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