Basic Chemical Engineering Knowledge: One Question per Day: March 2, 2011

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This post was last edited by sailan on 2011-3-2 12:32. Fill-in-the-blank question: According to phase rule analysis, the maximum value of the degree of freedom F for a three-component system is (). PS:: 1 q# _. E! D5 p1) The top 50 participants will definitely receive a reward; those who provide detailed analysis, discussions, and derivation processes will get 10-15 wealth points or 1 charm point:victory:. a 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: ； Indicate the question number when answering; otherwise, it will be difficult to determine whether the answer is correct: handshake. 3) The reference answers will be available once you reply; those who want to confirm their answers may refer to o. 4) Please also avoid submitting answers multiple times maliciously; 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 to learn more*. Click directly: Summary post of daily questions in the section on basic theories of chemical engineering (being added). According to F = C – P + 2, where C represents the number of components in a system and P represents the number of phases. In this problem, C = 3; if a system is composed of three components, namely A, B, and C, then it is referred to as a three-component system. Applying Gibbs’ phase rule to a three-component system gives F = 3 – P + 2 = 5 – P. Clearly, for a three-component system the maximum number of phases is 5, and the maximum number of degrees of freedom is 4; in other words, the system can have at most four independent intensive variables. They are temperature, pressure, and the two components. Because among the three components A, B, and C, only two of their composition scales are independent; their mass fractions must satisfy wA + wB + wC = 1.00. The answer is 4