ChEn 2001, Homework #7 Due Friday, November 13, 2009 Problem 1. Use Raoult’s Law to construct a T-x-y diagram for toulene and ethylbenzene at 600 mmHg. The x,y should refer to the mole fraction of the more volatile component. Problem 2. Consider an equilibrium ﬂash of isopentane and isopropanol. The feed to the ﬂash unit is 60 mol/hr isopentane and 40 mol/hr isopropanol. Answer the following questions about the following possible ways to operate the ﬂash tank: 1. If the ﬂash tank operates at 55 ◦ C and atmospheric pressure, what is the composition and ﬂow rates of the outlet streams? 2. If the ﬂash tank operates at 40 ◦ C and the liquid ﬂow rate is 40 mol/hr, what is the pressure of the tank? 3. If the gas ﬂow rate is 40 mol/hr and the system operates at atmospheric pressure, what is the temperature of the ﬂash tank? Problem 3 (Murphy 5.37). A natural gas stream (100 kmol/h) contains 98 mol% methane and 2 mol% hydrogen sulﬁde (H 2 S). H 2 S is a highly toxic gas. The concentration of H
This is the end of the preview. Sign up
access the rest of the document.