La Crosse - Thermodynamics Exam 1

# La Crosse - Thermodynamics Exam 1 - Thermodynamics Exam 1...

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Name ______________________________ Secret Identity/Code ________________________________ (so I can post scores anonymously) Approximate number of hours/week spent on homework __________ (for survey purposes, if you don’t mind) Instructions: You may use one page of notes. Please label & circle your answers. Show your work , where appropriate! There are 100 total points. Helpful Information : R = 8.31 J/kgK 0ºC = 273K (16 pts) Problem 1 : Multiple choice conceptual questions. Circle the letter of the most correct answer. Box the letter of your second choice, for half credit if your circle is wrong. 1.1. Do the Celsius and Fahrenheit temperature scales ever read the same? a. No, never. b. Only at some pressures. c. Only at some specific volumes. d. Yes, at absolute zero. e. Yes, at some other temperature. 1.2. Assuming the volume of an ideal gas is increasing from V 1 to V 2 , in which type of process is there the greatest change in entropy? a. adiabatic b. isothermal c. isobaric (constant pressure) d. all three are equal e. not enough information given 1.3. What is S of an ideal gas for an irreversible change in which both endpoints which coincidentally lie on an isotherm? a. 0 b. something smaller than nR ln( V 2 / V 1 ), but not zero. c. nR ln( V 2 / V 1 ) d. something larger than nR ln( V 2 / V 1 ) e. It cannot be determined from the information given. Thermo Exam 1 – pg 1

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La Crosse - Thermodynamics Exam 1 - Thermodynamics Exam 1...

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