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Consider an adiabatic, piston cylinder assembly containing 1 kmol of propane (C3H8) and 7 kmol of...

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Mechanical Engineering

Consider an adiabatic, piston cylinder assembly containing 1kmol of propane (C3H8) and 7 kmol of oxygen(O2). The piston is initially pinned, and the pressureis P1=1000 kPa with temperature T=1000 K. The pin is removed andthe system expands until the total cylinder pressure is P2=100 kPaand the temperature is T2=600 K. Assume ideal gases and constantspecific heat.

Oxygen: cp=0.918 kJ/kg*K, cv=0.658kJ/kg*K, MW=32 kmol/kg

Propane: cp=1.67 kJ/kg*K, cv=1.48 kJ/kg*K,MW=44 kmol/kg

Universal gas constant R=8.314 kJ/kmol*K

Find:

a) the mass of propane and oxygen in kg

b) the initial cylinder volume in m3

c) the work produced from state 1 to 2 in kJ

d) the amound of entropy generated from state 1 to 2 in kJ/K

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