Question

1. A tank of air contains 100 ft^3. The pressure and temperature are 1000 F and...

1. A tank of air contains 100 ft^3. The pressure and temperature are 1000 F and 100 psia. The air
is cooled to 100 F.
a. Find the mass of the air
b. Find the initial energy of the tank (Btu)
c. Find the final energy of the tank (Btu)
d. Compute the heat (Btu)

2. Water is contained inside a constant pressure piston cylinder device. The initial temperature
and quality of the water are x=0 and T=300 F. The water is heated to 500 F. The mass of the
water is 2 lbm. The cross-sectional area of the piston is 10 in^2.
a. Find the initial energy of the water (Btu)
b. Find the final energy of the water (Btu)
c. Determine how much work crossed the boundary (Btu). Hint use integral of Fdx
d. Determine how much heat crossed the boundary (Btu). Hint use an energy balance

Engineering   Mechanical-Engineering   
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