mech3020-s11-fe-rev

# mech3020-s11-fe-rev - MECH 3020 Thermodynamics II: Final...

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MECH 3020 Thermodynamics II: Final Exam Review General Information The exam will be closed book except for the property tables. You may bring many pages of refer- ence notes/formulas, which must be in your own handwriting. You may also bring copies of 1) the psychrometric chart, and 2) the combustion gas property chart, that I posted on the web. The ﬁrst problem on the exam will consist of 6–7 short concept–related questions, and will ask you to explain, in one or two sentences, key concepts, processes, features, etc., of the material presented during the semester. The rest of the exam will be in a multiple–choice format. There will be ample space on the exam for you to show your work. It is critical that you do show your work on the space provided. Partial credit will depend on it. The exam will be comprehensive: expect to see problems dealing with power and refrigeration cy- cles, mixture relations, air–vapor/psychrometric chart problems, combustion and chemical equilibrium. However, about 50% of the material on the exam will be over the material covered since the last exam. Review the study guides for the ﬁrst two exams: all the material is relevant to the ﬁnal. Combustion problems will involve chemical balancing (stoichiometry, fuel/air ratios, dew points) and the ﬁrst law (heat transfer, ﬂame temperature). Chemical equilibrium problems will involve identifying K P relations for a given equilibrium reaction, and using the relations to determine equilibrium mole fractions. The exam will take place on Tuesday May 3 at 8:00 am. Please spread out when your arrive in the classroom: there should be an empty seat between yourself and your neighbors. Review Problems 1. Gaseous ethyl alcohol (C 2 H 5 OH) is burned with 50% excess air in a constant–pressure combustion chamber. (a) Assuming complete combustion, write the balanced reaction for this combustion process. The stoichiometric coeﬃcient is 2 + 6

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## This note was uploaded on 09/24/2011 for the course MECH 3020 taught by Professor Mackowski during the Spring '11 term at Auburn University.

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mech3020-s11-fe-rev - MECH 3020 Thermodynamics II: Final...

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