(a) To determine The temperature of liquid-vapor mixture. The specific internal energy of the system. Explanation Write the expression of the quality of liquid-vapor mixture. v = v f + x ( v g − v f ) . (I) Here, the specific volume of liquid-vapor mixture is v , the specific volume of liquid is v f , the specific volume of vapor is v g and the quality of vapor mixture is x . Write the expression of the internal energy. u = u f + x ( u g − u f ) . (II) Here, the specific internal energy of liquid-vapor mixture is u , the specific internal energy of liquid state is u f and the specific internal energy of vapor state is u g . Conclusion: Refer to table A-8 “Properties of Refrigerant 22” to obtain the saturation temperature as − 14.66 ° C , specific volume of liquid as 0.7521 × 10 − 3 m 3 / kg , specific volume of vapor as 0.0765 m 3 / kg , internal energy at liquid state as 27.99 kJ / kg , internal energy at vapor state as 221.34 kJ / kg at pressure of 3 bar . Thus, the temperature of liquid-vapor mixture is − 14.66 ° C . Substitute 0.05 m 3 / kg for v , 0.7521 × 10 − 3 m 3 / kg for v f and 0.0765 m 3 / kg for v g in Equation (I). ( 0.05 m 3 / kg ) = ( 0.7521 × 10 − 3 m 3 / kg ) + x ( ( 0.0765 m 3 / kg ) − ( 0.7521 × 10 − 3 m 3 / kg ) ) ( 0.05 m 3 / kg ) − ( 0 (b) To determine The pressure of the fluid. The specific enthalpy of the fluid. (c) To determine The temperature of the system. The specific volume of the fluid.

Appendices to accompany Fundamentals of Engineering Thermodynamics, 8e

8th Edition

ISBN: 9781118957219

Author: Michael J. Moran, Howard N. Shapiro

Publisher: WILEY

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Chapter 3.14, Problem 38P

(a)

To determine

The temperature of liquid-vapor mixture.

The specific internal energy of the system.

(b)

To determine

The pressure of the fluid.

The specific enthalpy of the fluid.

(c)

To determine

The temperature of the system.

The specific volume of the fluid.

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Chapter 3.14, Problem 37P

Chapter 3.14, Problem 39P

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Appendices to accompany Fundamentals of Engineering Thermodynamics, 8e

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