phase diagram_pdf - elizondo(jie268 Phase Diagram...

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elizondo (jie268) – Phase Diagram – fakhreddine – (51550) 1 This print-out should have 4 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0points Answer the following about CO 2 using the provided phase diagram. What answer choice best describes the tem- perature at the triple point and critical point for CO 2 (triple point temperature, critical point temperature)? CarbonDioxide 3 1 4 2 200 250 300 350 400 10 0 10 1 10 2 10 3 10 4 Pressure, bar Temperature, K 1. Not enough information 2. 310 K, 220 K 3. 220 K, 220 K 4. 310 K, 310 K 5. 220 K, 310 K correct Explanation: 002 10.0points How many phase transitions occur by fol- lowing the steps described below? step 1: At 150 K going from 60 atm to 95 atm step 2: At 95 atm going from 150 K to 500 K step 3: At 500 K going from 95 atm to 20 atm 0 200 400 600 800 1000 0 20 40 60 80 100 Pressure, atm Temperature, K 1. 3 phase boundaries are crossed 2. 2 phase boundaries are crossed correct 3. 1 phase boundaries are crossed 4. 4 phase boundaries are crossed
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Unformatted text preview: Explanation: 003 10.0 points A 150 g sample of ice at-8 o C is added to 500 g water at 75 o C in an insulated container. What is the Fnal temperature after thermal equilibrium is reached? 1.-2.4 o C 2. 38.4 o C correct 3. 79 o C 4. 22 o C 5. 32.9 o C 6. 72.5 o C 7. 57.6 o C 8. 63.3 o C 9. 12.4 o C elizondo (jie268) – Phase Diagram – fakhreddine – (51550) 2 10.-24 o C Explanation: 004 10.0 points Consider an insulated system containing 150 g of liquid water and 150 g of ice at equilibrium under atmospheric pressure. A total of 22 g of steam at 120 ◦ C is admitted to the system. What is the phase composition and tempera-ture when equilibrium is reestablished? 1. 309 g of water and 13 g of ice at 0.0 ◦ C 2. 322 g of water at 3.5 ◦ C 3. 322 g of water at 7.2 ◦ C correct 4. 322 g of water at 0.0 ◦ C 5. 262 g of water and 60 g of ice at 0.0 ◦ C 6. 322 g of water at 48.1 ◦ C Explanation:...
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  • Spring '13
  • fakhreddine
  • pH, Triple point, elizondo

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