Solution Found!
Find the missing property of P, T, v, u, h, and x and
Chapter 3, Problem 74HP(choose chapter or problem)
Problem 74HP
Find the missing property of P, T, v, u, h, and x and indicate the states in a P–v and a T–vdiagram for
a. Water at 5000 kPa, u = 1000 kJ/kg
b. R-134a at 20°C, u = 300 kJ/kg
c. Nitrogen at 250 K, 200 kPa
Questions & Answers
QUESTION:
Problem 74HP
Find the missing property of P, T, v, u, h, and x and indicate the states in a P–v and a T–vdiagram for
a. Water at 5000 kPa, u = 1000 kJ/kg
b. R-134a at 20°C, u = 300 kJ/kg
c. Nitrogen at 250 K, 200 kPa
ANSWER:
Solution 74HP
Part (a)
Step 1 of 6:
Our aim is to find the missing property of water at the given pressure and the specific internal energy.
The given pressure P = 5000 kPa
The given specific internal energy u = 1000 kJ/kg
From the table B.1.4, we need to find the values of saturated temperature, specific enthalpy (h), and specific volume (v) using interpolation method.
S.No |
u (kJ/kg) (x) |
T (°C) (y) |
h (kJ/kg) (z) |
v (m3/kg) (w) |
1 |
938.43 |
220 |
944.36 |
0.001187 |
2 |
1031.34 |
240 |
1037.47 |
0.001226 |
3 |
1000 |
y3 |
z3 |
w3 |