Solution Found!
Using u?h Data For each case, determine the specified
Chapter 3, Problem 43P(choose chapter or problem)
For each case, determine the specified property value and locate the state by hand on sketches of the p-v and T-v diagrams.
(a) For Refrigerant 134a at \(T=160^{\circ} \mathrm{F}, h=127.7 \mathrm{Btu} / \mathrm{lb}\). Find v, in \(\mathrm{ft}^3 / \mathrm{lb}\).
(b) For Refrigerant 134a at \(T=90^{\circ} \mathrm{F}, u=72.71 \mathrm{Btu} / \mathrm{lb}\). Find h, in Btu/lb.
(c) For ammonia at \(T=160^{\circ} \mathrm{F}, p=60 \mathrm{lbf} / \mathrm{in} .{ }^2\) Find u, in Btu/lb.
(d) For ammonia at \(T=0^{\circ} \mathrm{F}, p=35 \mathrm{lbf} / \mathrm{in}^2{ }^2\) Find u, in Btu/lb.
(e) For Refrigerant 22 at \(p=350 \mathrm{lbf} / \mathrm{in}^2, T=350^{\circ} \mathrm{F}\). Find u, in Btu/lb.
Questions & Answers
QUESTION:
For each case, determine the specified property value and locate the state by hand on sketches of the p-v and T-v diagrams.
(a) For Refrigerant 134a at \(T=160^{\circ} \mathrm{F}, h=127.7 \mathrm{Btu} / \mathrm{lb}\). Find v, in \(\mathrm{ft}^3 / \mathrm{lb}\).
(b) For Refrigerant 134a at \(T=90^{\circ} \mathrm{F}, u=72.71 \mathrm{Btu} / \mathrm{lb}\). Find h, in Btu/lb.
(c) For ammonia at \(T=160^{\circ} \mathrm{F}, p=60 \mathrm{lbf} / \mathrm{in} .{ }^2\) Find u, in Btu/lb.
(d) For ammonia at \(T=0^{\circ} \mathrm{F}, p=35 \mathrm{lbf} / \mathrm{in}^2{ }^2\) Find u, in Btu/lb.
(e) For Refrigerant 22 at \(p=350 \mathrm{lbf} / \mathrm{in}^2, T=350^{\circ} \mathrm{F}\). Find u, in Btu/lb.
ANSWER:Step 1 of 5
(a)
Obtain the properties of the refrigerant at and , from superheated vapor tables of refrigerant :
Pressure,
Obtain the properties of the refrigerant at and from
Super-heated vapor tables of refrigerant 134 .
Specific volume,
Therefore, the specific volume of superheated refrigerant is .