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The substance oxygen has the following properties: normal melting point: 54.8 K normal boiling point: 90.2 K 1.50x103 atm, 54.4 K triple point: critical point: 49.8 atm, 154.6 K A sample of oxygen at a pressure of 1.00 atm and a temperature of 106.3 K is cooled at constant pressure to a temperature of 56.9 K. Which of the following are true? Choose all that apply O One or more phase changes will occur. O The liquid initially present will vaporize. O The final state of the substance is a solid. O The final state of the substance is a liquid. O The sample is initially a gas.

The substance oxygen has the following properties: normal melting point: 54.8 K normal boiling point: 90.2 K 1.50x103 atm, 54.4 K triple point: critical point: 49.8 atm, 154.6 K A sample of oxygen at a pressure of 1.00 atm and a temperature of 106.3 K is cooled at constant pressure to a temperature of 56.9 K. Which of the following are true? Choose all that apply O One or more phase changes will occur. O The liquid initially present will vaporize. O The final state of the substance is a solid. O The final state of the substance is a liquid. O The sample is initially a gas.

Chemistry
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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The substance oxygen has the following properties: normal melting point: 54.8 K normal boiling point: 90.2 K triple point: critical point: 1.50×103 atm, 54.4 K 49.8 atm, 154.6 K A sample of oxygen at a pressure of 1.00 atm and a temperature of 106.3 K is cooled at constant pressure to a temperature of 56.9 K. Which of the following are true? Choose all that apply O One or more phase changes will occur. O The liquid initially present will vaporize. O The final state of the substance is a solid. O The final state of the substance is a liquid. O The sample is initially a gas. Submit Answer Retry Entire Group 1 more group attempt remaining Previous Next
Transcribed Image Text:The substance oxygen has the following properties: normal melting point: 54.8 K normal boiling point: 90.2 K triple point: critical point: 1.50×103 atm, 54.4 K 49.8 atm, 154.6 K A sample of oxygen at a pressure of 1.00 atm and a temperature of 106.3 K is cooled at constant pressure to a temperature of 56.9 K. Which of the following are true? Choose all that apply O One or more phase changes will occur. O The liquid initially present will vaporize. O The final state of the substance is a solid. O The final state of the substance is a liquid. O The sample is initially a gas. Submit Answer Retry Entire Group 1 more group attempt remaining Previous Next
A generic phase diagram (not to scale!) for a one component system is shown below, in which pressure in atmospheres is plotted against temperature in Kelvin. The diagram shows the temperatures and pressures (areas) in which the solid, liquid, and gaseous phases are stable, as well as the temperatures and pressures (lines) at which the phases are in equilibrium with each other. B P critical liquid 1.00 solid atm A P triple gas T triple T melt T boil T critical T Kolvin • The triple point (A) is the unique temperature and pressure at which all three phases are in equilibrium with each other. • The line segment A-D, represents equibrium between the solid and liquid phases, and is often called the melting point curve. It shows how the melting temperature changes with pressure. The temperature at which the solid and liquid are in equilibrium at a pressure of one atmosphere is called the normal melting point. • The line segment A-B, represents equibrium between the liquid and gaseous phases, and is often called the boiling point curve. It shows how the vapor pressure of the liquid varies with temperature and is also called the vapor pressure curve. The temperature at which the liquid and the vapor are in equilibrium at a pressure of one atmosphere is called the normal boiling point. • The vapor pressure curve terminates at the critical point (B). It is not possible to liquefy the gas, above the critical temperature. The critical pressure is the pressure required to liquefy the gas at the critical temperature. Above the critical pressure and temperature, the substance is a supercritics • The line segment A-C shows the temperatures and pressure at which the solid and gaseous phases are in equilibrium and is sometimes ca Previous Next
Transcribed Image Text:A generic phase diagram (not to scale!) for a one component system is shown below, in which pressure in atmospheres is plotted against temperature in Kelvin. The diagram shows the temperatures and pressures (areas) in which the solid, liquid, and gaseous phases are stable, as well as the temperatures and pressures (lines) at which the phases are in equilibrium with each other. B P critical liquid 1.00 solid atm A P triple gas T triple T melt T boil T critical T Kolvin • The triple point (A) is the unique temperature and pressure at which all three phases are in equilibrium with each other. • The line segment A-D, represents equibrium between the solid and liquid phases, and is often called the melting point curve. It shows how the melting temperature changes with pressure. The temperature at which the solid and liquid are in equilibrium at a pressure of one atmosphere is called the normal melting point. • The line segment A-B, represents equibrium between the liquid and gaseous phases, and is often called the boiling point curve. It shows how the vapor pressure of the liquid varies with temperature and is also called the vapor pressure curve. The temperature at which the liquid and the vapor are in equilibrium at a pressure of one atmosphere is called the normal boiling point. • The vapor pressure curve terminates at the critical point (B). It is not possible to liquefy the gas, above the critical temperature. The critical pressure is the pressure required to liquefy the gas at the critical temperature. Above the critical pressure and temperature, the substance is a supercritics • The line segment A-C shows the temperatures and pressure at which the solid and gaseous phases are in equilibrium and is sometimes ca Previous Next
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