fall 2010 Exam II

fall 2010 Exam II - CHBE 2100 Exam I page 1/13 ChBE 2100...

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____ CHBE 2100 Exam I page 1/13 ChBE 2100 Chemical Process Principles Fall 2010 Exam II There are 4 problems, each worth a different number of points. There are some tables at the end of the exam that you may find useful. Please read the questions carefully. This exam is closed-book. However, you are allowed one 8.5" x 11" piece of paper (one side only) with any information you want on it. These notes must be your own and may not be copied from another person. All other relevant information is provided. The use of wireless devices (e.g. cell phones, IR transmitters/receivers) is not permitted. The use of programmable calculators is only allowed if all relevant content has been erased from the calculator memory and the programmable features are not used. To receive full credit on each problem, it is advised to start with the appropriate full form of the balance equation(s) needed to solve the problem. Label all variables and equations. Include a brief word description to explain each step in your problem if appropriate. State all your assumptions clearly. Present your solution clearly. Numerical answers without units or explanations will not receive credit. Name: ----------:--------- (Please write your name on the back of the last page of the exam too) The work presented here is solely my own. I did not receive any assistance nor did I assist other students during the exam. I pledge that I have abided by the above rules and the Georgia Tech Honor Code. Signed: _ Problem 1 _____/30 Problem 2 ____--:/20 Problem 3 ____--:125 Problem 4 --:/25 Total ____--:/100
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CHBE 2100 Exam I page 2/13 Problem 1 (30 points) (a) (4 points) A vessel contains only ethyl acetate at a temperature of 25°C and a pressure of 90 mmHg. Under these conditions, is the ethyl acetate a liquid, a vapor, or both? You must justify your answer with an explanation/calculation (Answers without explanation/calculation will receive no credit). liquid vapor both (b) (4 points) A vessel contains only ethylene at a temperature of -60°F and a pressure of 200 psia. Under these conditions, is the ethylene a liquid, a vapor, or both? You must justify your answer with an explanation/calculation (Answers without explanation/calculation will receive no credit). (c) (4 points) A vessel contains a mixture of water, MIBK and acetone at a temperature of 25°C and a pressure of 1 atm. This mixture has separated into two liquid phases. One of the liquid phases contains 85 wt% water. What is the percent acetone in the other liquid phase? You must justify your answer with -~~~_%
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CHBE 2100 Exam I page 3/13 (d) (15 points) A vessel with a volume of 0.10 m 3 contains a 2.0 kg of water, some of which is liquid and some of which is vapor. The pressure is 80 psia. Calculate the ~Of liquid water and the ~f water vapor in the vessel (Hint: the water vapor is not an ideal gas). \rotu~L. ~~s~ Mass of water vapor = kg Volume of liquid water = m 3 (e) (3 points) List three critical design considerations for the Alaska pipeline.
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fall 2010 Exam II - CHBE 2100 Exam I page 1/13 ChBE 2100...

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