Document 1gg51wZJay8z99KxQL7q2BYvX

748 CHAPTER 39 1949 Guide Refrigeration HDNI 3HVflOS SONnOd - 3H0SS3ad 3imo$9V 749 300 S C A L E .C H A N C E ' 40 F is passing through a pipe, its volume and enthalpy can be determined from Table 1 as 0.0116 cu ft per pound and 17.0 Btu per pound. Frequently it is necessary to determine the properties of a wet vapor or of a mixture of liquid with some added vapor, such as is found at discharge from an expansion valve. This can be done from the tables by noting that the specific enthalpy of the mixture must be equal to that of the saturated ' - liquid plus a fraction of the latent heat of vaporisation equal to the fraction /