Homework #2 MEMS 0051 – Introduction to Thermodynamics solved

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Problem #1
Use the thermodynamic steam tables to determine the phase (compressed/subcooled liquid, saturated liquid, saturated water, saturated vapor, superheated vapor) of water at the following conditions. In addition to identifying the
phase, create one T-ν and one P-ν diagram and plot each item with a dot, indicating it’s phase as well. To create
the T-ν and P-ν diagrams, plot temperature versus saturated liquid and vapor specific volume and pressure versus
saturated liquid specific volume in Matlab. Ensure the x- and y-axis scales are appropriate (logarithmic and linear,
respectively). Include axes labels, units and chart title.
(a) 100 ◦C, 101.3 [kPa]
(b) 180 ◦C, 2,000 [kPa]
(c) 160 ◦C, 400 [kPa]
(d) 400 ◦C, 200 [kPa]
(e) 133.5 ◦C, 300 [kPa]
(f) 100 ◦C, 800 [kPa]
(g) 100 [kPa], 1.500 [m3/kg]
(h) 100 [kPa], 2.500 [m3/kg]
(i) 500 [kPa], 0.001070 [m3/kg]
(j) 50 ◦C, 5.0 [m3/kg]
(k) 150 ◦C, 1.5 [m3/kg]
(l) 100 ◦C, 0.001043 [m3/kg]
Problem #2
Determine the specific volume of the following states of water. Create one T-ν and one P-ν diagram and plot each
item with a dot, indicating it’s phase as well
(a) 320 ◦C, 200 [kPa]
(b) 105 ◦C, 2,000 [kPa]
(c) 60 ◦C, 200 [kPa]
(d) Saturated liquid at 400 [kPa]
(e) Saturated vapor at 125 ◦C
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