Use the phase diagram for CO2 to answer the following. 2. At what temperature does sublimation (at 1 atm) of CO2 occur? 3. In which phase does CO2, exist at atmospheric pressure and room temperature 4. In which phase does CO2, exist at 10 atm and -15°C? 5. Find the pressure and temperature of CO2, triple point. 6. Find the critical pressure and critical temperature of CO2. 7.What is the melting point of CO2, at 100 atm? 8. From its phase diagram, why do you think CO, is called 'dry ice"?

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Use the phase diagram for CO2 to answer the following. 2. At what temperature does sublimation (at 1 atm) of CO2 occur? 3. In which phase does CO2, exist at atmospheric pressure and room temperature 4. In which phase does CO2, exist at 10 atm and -15°C? 5. Find the pressure and temperature of CO2, triple point. 6. Find the critical pressure and critical temperature of CO2. 7.What is the melting point of CO2, at 100 atm? 8. From its phase diagram, why do you think CO, is called 'dry ice"?
10,000
1,000
CO₂ solid
CO₂ liquid
100
Sublimation point
10 -78.5°C at 1 atm
Liquid + gas
1
0.1
Triple point
-56.6°C at 5.11 atm
0.01
0.001
-140-120 -100 -80 -60 -40 -20 0
20 40
Temperature (°C)
Pressure-temperature phase diagram for CO₂
Pressure (atm)
Solid + gas
Solid + liquid
Critical point
CO₂ gas
60 80 100
Transcribed Image Text:10,000 1,000 CO₂ solid CO₂ liquid 100 Sublimation point 10 -78.5°C at 1 atm Liquid + gas 1 0.1 Triple point -56.6°C at 5.11 atm 0.01 0.001 -140-120 -100 -80 -60 -40 -20 0 20 40 Temperature (°C) Pressure-temperature phase diagram for CO₂ Pressure (atm) Solid + gas Solid + liquid Critical point CO₂ gas 60 80 100
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