Basic Chemical Engineering Knowledge: [Question of the Day] 2011-02-18

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This post was last edited by bananaaspen on 2011-2-18 at 20:19. I’m conducting an experiment on the liquid-liquid phase equilibrium of n-hexane-ethanol-water at 30 degrees Celsius and under normal pressure in the laboratory. What is the number of degrees of freedom? A, 1 ； B, 2 ； C, 3 ； D, 4 ； 1) The top 50 active participants will definitely receive rewards. Those who provide a detailed process and reasoning will be awarded 1–15 Wealth points :victory:. 2) Please hide your replies. The method to do this is: http://bbs.hcbbs.com/thread-492556-1-1.html. Do not edit your replies after posting them{:1_90:}, and also avoid copying others’ answers, as that will result in a penalty:funk: ； When answering, indicate the question number; otherwise, it’s difficult to determine whether the answer is correct or not: handshake. 5 L+ \2 g1 r; y0 y7 M4 W- x 3) The reference answers can be seen upon replying. Sea friends who wish to confirm the answers may refer to this: o. 4) Please also avoid submitting answers repeatedly in a malicious manner; if it is due to an operational error, please contact the forum moderators or administrators: call:. Otherwise, points will be deducted. 5) Currently, all the daily questions in the section on basic chemical engineering theories have been compiled; interested users can go and take a look and learn from them*. Direct click: Compilation post of one question per day in the Basic Theory of Chemical Engineering section (currently being updated). A. According to the phase rule, degrees of freedom = number of components – number of phases + 2. Here, the number of components is 3 and the number of phases is 2. The “2” refers to temperature and pressure; since both temperature and pressure have already been determined, this “2” cannot be counted. Therefore, the degrees of freedom is 1. Also, the moderator of “Cloud Neutron” on floor 27 explained it in great detail; you should take a look.