Only part C is needed MasteringChemistry: Post-Lecture Homework Chapter 11 - Mic

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Only part C is needed

MasteringChemistry: Post-Lecture Homework Chapter 11 - Microsoft Edge https://session.masteringchemistry.com/myct/itemView?as D=96617032&offset-next; Post-Lecture Homework Chapter 11 Interactive Activity-Phase Diagrams for Carbon Dioxide 18 of 22 78.5 -56.7 Temperature (not to scale) 31°C Using the interactive diagram, you can observe what the phase of CO experienced by CO2 molecules in a particular phase. is at a particular temperature and pressure by moving the cursor to that point on the phase diagram. The animation also shows the type of movement Part A Part B Part C Open the phase diagram for CO2 given in the introduction again. Use the phase diagram for CO2 in the interactive activity and determine which of the following statements are correct. Check all that apply View Available Hint(s) CO2 is a gas under normal conditions of temperature and pressure. when the pressure is 4 atm and the temperature is more than-56.7°C, CO2 exists as a solid. Movement across boundary line BO corresponds to a phase change. All three phases of CO2 exist simultaneously at the triple point. CO2 forms a supercritical fluid at temperatures less than 31°C. When the pressure is 1 atm. tere is no temperature at which the liquid phase of CO2 exists. Submit Next > 140 AM 1/14/2018 Provide Feedback 0 Type here to search

Explanation / Answer

A)

Normal conditions

Pressure P = 1 atm

Room Temperature T = 25°C

CO2 is gas

This statement is correct

B)

From the phase diagram it is clear that

Triple point temperature = - 56.7°C at 5.1 atm

At 4 atm, temperature will be less than - 56.7°C

This statement is wrong.

C)

BO represents equilibrium line between solid and gas phase.

sublimation (solid to gas) and deposition (gas to solid) occurs along the movement across boundary line BC

This statement is correct

D)

At triple point, all three phases coexist.

This statement is correct

E)

CO2 becomes supercritical fluid above its critical temperature of 31.10 °C and above its critical pressure of 72.9 atm.

This statement is wrong.

F)

At 1 atm, there is no such temperature exist so that gaseous CO2 becomes liquid CO2

This statement is correct.

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