ECE106 Midterm: ECEs16midq
31 Jan 2019
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Instructions: this is a 2 hour, closed-book examination, permitted aids include, one 8. 5 in. 11 in. crib sheet (one side only), property tables booklet for introduction to thermodynamics and heat transfer, Yunus cengel, 2nd ed: calculator, answer all questions in the space provided. If additional space is required, use the back of the pages or the blank pages included: it is your responsibility to write clearly and legibly. Part marks will be given for part answers, provided that your methodology is clear. A rigid container holds water at the critical point. The container is cooled until the pressure reaches a) 10 m p a, b) 1. 0 m p a and c) 0. 1 m p a. Determine the temperature, tcrit and pressure, pcrit at the critical point. Determine the quality of the water at each value of pressure, the temperature and the heat loss necessary to move between each value of pressure. Enter your calculated values in the table below.
