Question

day 24 name aaron amestae date 9/20/25 period 3rd score_ ws phase diagram of co2 carbon dioxide phase diagram pressure bar 100 90 80 70 60 50 40 30 20 10 0 -100 -75 -50 -25 0 25 50 75 100 temperature °c x = -52°c independent y = 17 bar dependent point a 1...describe what will happen if temperature fall to -80°c. 2...describe what will happen if temperature rises to 80°c. 3...describe what will happen if pressure falls to 5 bars. 4...describe what will happen if pressure rises to 100 bars. 5...describe what will happen it the temperature rises to 0°c, then the pressure rises to 50 bars. 6...describe what will happen if the pressure rises to 50 bars, then the pressure rises to 0°c. point b 7...describe what will happen if temperature falls to -80°c. 8...describe what will happen if temperature rises to 80°c. 9...describe what will happen if pressure falls to 5 bars. 10...describe what will happen if pressure rises to 100 bars. 11...describe what will happen it the temperature rises to 0°c, then the pressure rises to 50 bars. 12...describe what will happen if the pressure rises to 50 bars, then the temperature rises to 0°c.

Explanation:

Step1: Analyze phase - diagram behavior

Refer to the carbon - dioxide phase diagram. Each point on the diagram represents a combination of temperature and pressure, and phase changes occur when crossing the phase - boundary lines.

Step2: Answer question 1

At point A, when the temperature falls to - 80°C, referring to the phase diagram, the liquid CO₂ will freeze as it moves into the solid - phase region.

Step3: Answer question 2

When the temperature rises to 80°C at point A, the liquid CO₂ will vaporize/boil as it enters the gaseous - phase region.

Step4: Answer question 3

When the pressure falls to 5 bars at point A, the liquid CO₂ will vaporize/boil as it crosses into the gaseous - phase region.

Step5: Answer question 4

When the pressure rises to 100 bars at point A, the liquid CO₂ will become compressible as it moves into the compressible - liquid region.

Step6: Answer question 5

If the temperature rises to 0°C and then the pressure rises to 50 bars at point A, the liquid CO₂ boils initially as it crosses the liquid - gas boundary with the temperature increase, and then condenses back to liquid as the pressure is increased further.

Step7: Answer question 6

If the pressure rises to 50 bars and then the temperature rises to 0°C at point A, the liquid CO₂ first gets pressurized and then warms up. It may remain in the liquid phase or cross into the supercritical phase depending on the exact path on the phase diagram.

Step8: Answer question 7 (point B)

When the temperature falls to - 80°C at point B, the solid CO₂ gets colder as it remains in the solid - phase region.

Step9: Answer question 8 (point B)

When the temperature rises to 80°C at point B, the solid CO₂ will first melt to liquid (if it crosses the solid - liquid boundary) and then vaporize as it enters the gaseous - phase region.

Step10: Answer question 9 (point B)

When the pressure falls to 5 bars at point B, the solid CO₂ will sublimate directly to the gaseous phase as it crosses the solid - gas boundary.

Step11: Answer question 10 (point B)

When the pressure rises to 100 bars at point B, the solid CO₂ will turn into liquid as it crosses the solid - liquid boundary.

Step12: Answer question 11 (point B)

If the temperature rises to 0°C and then the pressure rises to 50 bars at point B, the solid CO₂ will first melt to liquid (if it crosses the solid - liquid boundary with the temperature increase) and then may remain liquid or cross into the supercritical phase as the pressure is increased.

Step13: Answer question 12 (point B)

If the pressure rises to 50 bars and then the temperature rises to 0°C at point B, the solid CO₂ will first undergo a pressure - induced phase change (possibly to liquid) and then warm up, potentially crossing into the supercritical phase.

Answer:

1. Liquid CO₂ will freeze.
2. Liquid CO₂ will vaporize/boil.
3. Liquid CO₂ will vaporize/boil.
4. Liquid CO₂ will become compressible.
5. Liquid CO₂ boils then condenses back to liquid.
6. Liquid CO₂ gets pressurized then warms up.
7. Solid CO₂ gets colder.
8. Solid CO₂ melts then the liquid vaporizes.
9. Solid CO₂ sublimates.
10. Solid CO₂ turns into liquid.
11. Solid CO₂ melts (if applicable) and may change phase further with pressure increase.
12. Solid CO₂ changes phase with pressure increase and then warms up.