Question

Figure 5.3: A typical enthalpy- entropy phase diagranm nt Exercise 5 nt mixtu uai1. At 450'F a mixture of saturated steam and liquid water exists in equilibrium. If the specific volume of the mixture is 0.6673 ft/Ibm, calculate from data in the stream tables a. percent mixture or quality b. enthalpy of the mixture in Btu/lbm, and c. entropy of the mixture, in Btu/Ibm R gram 2. nCHio is stored as a compressed fluid at 310F and 56 atm pressure. In order to use n-CaHso in a low pressure process, it is throttled to 1.5 atm and passed to a vaporiser. From the vaporiser, the n-CaH o emerges as a gas at 160°F and 1.5 atm. Calculate, the heat that must be supplied to the vaporiser per pound mass of n-CaHio passing through For n-CT 765 R 90

Answer 1

sg= 1.4812. BTU 1 um R Ow