Solution for Engineering Heat Transfer 2nd Edition Chapter 5, Problem 2

by William S. Janna
196 Solutions 12 Chapters 16651 Studied ISBN: 9780849321269 Physics 5 (1)

Chapter 5, Problem Example 2 : Example 5.2 Dichlorodifluoromethane is used in...

Example 5.2

Dichlorodifluoromethane is used in refrigeration and air-conditioning systems and is more commonly known as Freon-12. Using the data in Appendix Table C.3 for Freon-12, verify the value shown for the volumetric thermal-expansion coefficient. Repeat the calculations for helium at 400 K.


Step-By-Step Solution

Example 5.2


Equation 5.8 is the defining equation. Before it can be used, however, it must be rewritten in

difference, rather than differential, form. Note that the data on Freon-12 in the appendix are for

the saturated liquid state. The saturation pressure changes with temperature, so the information in Appendix Table C.3 is not constant-pressure data. It is all that is available in this text, however.  The helium data are for constant-pressure conditions



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