An 05 m3 rigid tank contains equal volumes of freon-12

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Reference no: EM13631458

An 0.5 m^3 rigid tank contains equal volumes of Freon-12 vapor and Freon-12 liquid at 312K. Additional Freon-12 is added to the tank until the total mass of Freon-12 (liquid + vapor) is 400 kg. (Some vapor is led off to maintain the original temperature and pressure with a final mass of 400 kg.) At 312K, P sat for Freon-12 is 0.9334 MPa. Under these saturation conditions,

vf = 0.000795 m^3/kg and vg = 0.01872 m^3/kg.

What is the final mass of Freon-12 vapor?

a. 10 kg

b. 39 kg

c. 100 kg

d. 300 kg

What is the final volume of the Freon-12 liquid?

a. 0.16 m3
b. 0.18 m3
c. 0.31 m3
d. 0.39 m3

What was the mass of Freon-12 added to the tank?

a. 14 kg
b. 22 kg
c. 46 kg
d. 72 kg

What is the change in internal energy of air (an ideal gas) cooled from 550 C to 100 C?

a. 320 kJ/kg
b. 390 kJ/kg
c. 450 kJ/kg
d. 550 kJ/kg

Reference no: EM13631458

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