Question

Thermodynamics

Chapter 2 1. Predict the state (liquid, vapor, solid, or two phase in equilibrium) of H20 at the conditions below and locate these states on the sketches of p-v and T-y diagrams. (a)p- 10 bar, T-452.9°C, (b) p-10 bar, T = 423 K. (c) T = 373 K, pー0.5 bar, and (d) 7- 293 K.p 50 bar. 2. 1 lb of NHs in a tank is stored in a 1.0 ft tank. Estimate the quality if the temperature is (a) 100°F, (b) 0°F. Locate its states on a sketch of the T-v diagram.

Answer 1

1)
The state of the water can be predicted if the P-T diagram of water is known with its critical and tripple point. Here, a P-T diagram is drawn and the given cases a,b,c,d are plotted as points Pa,Pb,Pc,Pd. Based on the point location, the state of water is predicted.

General P-T diaram of coatey Poessu ve 20. bos Liqud Pb Pe 0-06 bar Vapov 98 233 ISI K 333 Isk Temperature → The above d agram is be notas n hard on th covitical data ev Wak - The poin tT iTipple Point where water a93 ISI K and o o6 bat -) is Cnn ticak Point at which both peint uquid and gog ie at 62.I5 k and 2201 be phare have dens

Pornt Temperature PressreS-taute Napo Vapor 4S29 C 423 K 373k lo bax to bat 015, bar Pb Pc 93大 B plofting temperatune and Pressuse lin grapl,

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