4. What pressure would be required to liquefy (or condense) a sample of water vapor at 500°C? 218 a. 0.0060 atm b. 1 atm C. 218 atm some pressure higher than 218 atm but which cannot be determined from the phase diagram d. 1.00- 0.0060- no amount of pressure can bring about the change of H20 vapor to liquid at 500°C е. 100 374 °c) Temperature Pressure (atm)

4. What pressure would be required to liquefy (or condense) a sample of water vapor at 500°C? 218 a. 0.0060 atm b. 1 atm C. 218 atm some pressure higher than 218 atm but which cannot be determined from the phase diagram d. 1.00- 0.0060- no amount of pressure can bring about the change of H20 vapor to liquid at 500°C е. 100 374 °c) Temperature Pressure (atm)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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In the Pressure vs Temperature phase diagram of a substance X, the triple point exists at p = 5 atm and T= 25 °C. Which of the following statements is true regarding substance X? A. At atmospheric pressure, an increase in temperature would cause X to undergo a phase transition from a solid state to a liquid state. B. At atmospheric pressure, an increase in temperature would cause X to undergo a phase transition from a solid state directly to a gaseous state. C. At atmospheric pressure, an increase in temperature would cause X to undergo a phase transition from a liquid state to a gaseous state. D. At atmospheric pressure, a decrease in temperature would cause X to undergo a phase transition from a liquid state to a solid state. E. At atmospheric pressure, a decrease in temperature would cause X to transition from a gaseous state to a liquid state. ndergo a phase
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1. Freon-12 (CCl2F2) is banned as a refrigerant because it is harmful to the ozone. a. Sketch the phase diagram of CCl2F2 using the physical constants below Normal boiling point = -29.8 °C Normal melting point = -158 °C Critical temperature = 112 °C Critical pressure = 40.8 atm Triple point (2.42 ×10-6 atm, -157 °C) b. Calculate the heat required to bring 10.0g CCl2F2 from -29.8 °C as a liquid to the gas phase at 10.0 °C. (molar mass 120.91 g/mol) Cs (gas) = 0.074 kJ/mol·K AHvap = 20.1 kJ/mol AHfus = 4.14 kJ/mol
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Name: Period: Date: Unit 14: Thermodynamics Part 1: Phase Diagrams Below is a Phase Diagram for WATER. Critical point 225 atm 1 atm Water (liquid) Ice Pressure (solid) Water vapor (gas) 0.006 atm Triple point 0.01° C 100° C 3740 C Temperature Drawing is not to scale 1. The point where all three phases of matter exist is called the 2. The triple point for water is at and 3. The temperature above which a substance cannot be a liquid is called the 4. The critical point for water is at and 5. Normal freezing and boiling points always occur at atm. 6. Water's freezing point is and its boiling point is 7. What is the state of water at 200°C and 200 atm? 8. Beginning at 1 atm and 1.0°C, what phase change occurs when the pressure drops to 0.004 atm? 9. What phase change occurs if steam at 300°C and 1.5 atm cools to 50°C at constant pressure? 10. What phase change occurs if water at 50°C and 1.5 atm is placed in a vacuum at a pressure of 0.002 atm?
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Below is the phase diagram for iodine. If you start with a sample of iodine at 150°C and 1.0 atm and you increase the temperature, what phase change will you observe? a. boiling b. melting c. sublimation d. melting, then boiling
Phase Diagram of Water and Carbon a) What are the phase changes highlighted by the forward and reverse arrows called? b) What names are given to point A and C? b) The boundary line A-B slightly tilted to the left. What are the physical and biological significance of this?