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29. Which of the following gases cannot be liquefied at 25°C? a. C,H6, critical temperature 562 K b. NH3, critical temperature 405 K c. CO2, critical temperature 304 K d. Cl2, critical temperature 419 K e. O2, critical temperature 155 K 30. The critical temperature and pressure of CO2 are 31°C and 73 atm. Which of the following is true? a. At 31°C, CO, cannot be liquefied no matter how great the pressure b. At 31°C, CO, can be solidified at 150 atm c. At 31°C, CO2 can be liquefied at pressures below 73 atm d. At 31°C, CO2 can be liquefied at pressures greater than 73 atm e. At 31°C, CO2 exists as an equilibrium mixture of solid, liquid and vapor 31. The phase diagram for a pure substance is given below. 300+ 250 Liquid 200 + Pressure, 150 + atm Solid 100+ Vapor 50+ 100 200 300 400 Temperature, K What is the lowest temperature at which liquid can exist? b. 0 K a. 150 K с. 250 K d. 400 K e. 200 K 32. The following unit cell is the b. hexagonally close-packed unit cell d. primitive cubic unit cell a. face-centered cubic unit cell c. body-centered cubic unit cell e. coordination number 8 cubic unit cell

29. Which of the following gases cannot be liquefied at 25°C? a. C,H6, critical temperature 562 K b. NH3, critical temperature 405 K c. CO2, critical temperature 304 K d. Cl2, critical temperature 419 K e. O2, critical temperature 155 K 30. The critical temperature and pressure of CO2 are 31°C and 73 atm. Which of the following is true? a. At 31°C, CO, cannot be liquefied no matter how great the pressure b. At 31°C, CO, can be solidified at 150 atm c. At 31°C, CO2 can be liquefied at pressures below 73 atm d. At 31°C, CO2 can be liquefied at pressures greater than 73 atm e. At 31°C, CO2 exists as an equilibrium mixture of solid, liquid and vapor 31. The phase diagram for a pure substance is given below. 300+ 250 Liquid 200 + Pressure, 150 + atm Solid 100+ Vapor 50+ 100 200 300 400 Temperature, K What is the lowest temperature at which liquid can exist? b. 0 K a. 150 K с. 250 K d. 400 K e. 200 K 32. The following unit cell is the b. hexagonally close-packed unit cell d. primitive cubic unit cell a. face-centered cubic unit cell c. body-centered cubic unit cell e. coordination number 8 cubic unit cell

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter10: Gases And Their Properties
Section: Chapter Questions
Problem 88GQ: A study of climbers who reached the summit of Mount Everest without supplemental oxygen showed that...
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Please help me with questions 31 & 32. Thank you in advance

29. Which of the following gases cannot be liquefied at 25°C? a. C,H6, critical temperature 562 K b. NH3, critical temperature 405 K c. CO2, critical temperature 304 K d. Cl2, critical temperature 419 K e. O2, critical temperature 155 K 30. The critical temperature and pressure of CO2 are 31°C and 73 atm. Which of the following is true? a. At 31°C, CO2 cannot be liquefied no matter how great the pressure b. At 31°C, CO2 can be solidified at 150 atm c. At 31°C, CO2 can be liquefied at pressures below 73 atm d. At 31°C, CO2 can be liquefied at pressures greater than 73 atm e. At 31°C, CO2 exists as an equilibrium mixture of solid, liquid and vapor 31. The phase diagram for a pure substance is given below. 300 250 + Liquid 200 Pressure, 150 + atm Solid 100 Vapor 50 100 200 300 400 Temperature, K What is the lowest temperature at which liquid can exist? b. 0 K a. 150 K с. 250 K d. 400 K е. 200 K 32. The following unit cell is the b. hexagonally close-packed unit cell d. primitive cubic unit cell a. face-centered cubic unit cell c. body-centered cubic unit cell e. coordination number 8 cubic unit cell
Transcribed Image Text:29. Which of the following gases cannot be liquefied at 25°C? a. C,H6, critical temperature 562 K b. NH3, critical temperature 405 K c. CO2, critical temperature 304 K d. Cl2, critical temperature 419 K e. O2, critical temperature 155 K 30. The critical temperature and pressure of CO2 are 31°C and 73 atm. Which of the following is true? a. At 31°C, CO2 cannot be liquefied no matter how great the pressure b. At 31°C, CO2 can be solidified at 150 atm c. At 31°C, CO2 can be liquefied at pressures below 73 atm d. At 31°C, CO2 can be liquefied at pressures greater than 73 atm e. At 31°C, CO2 exists as an equilibrium mixture of solid, liquid and vapor 31. The phase diagram for a pure substance is given below. 300 250 + Liquid 200 Pressure, 150 + atm Solid 100 Vapor 50 100 200 300 400 Temperature, K What is the lowest temperature at which liquid can exist? b. 0 K a. 150 K с. 250 K d. 400 K е. 200 K 32. The following unit cell is the b. hexagonally close-packed unit cell d. primitive cubic unit cell a. face-centered cubic unit cell c. body-centered cubic unit cell e. coordination number 8 cubic unit cell
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