Phase Diagram for CO2 The phase diagram for CO2 is shown in the figure(Figure 1)

Q: Phase Diagram for CO2 The phase diagram for CO2 is shown in the figure(Figure 1)

a) from the above graph, at T=20 oC and P=500kPa the phase of the CO2 is "gas" b) from the above graph, at T=-80 oC and P=120kPa the phase of the CO2 is "solid" c) the minimum pressure required to keep CO2 in the liquid phase at 20oC is P=5707kPa

ID: 1564003 • Letter: P

Question

Phase Diagram for CO2 The phase diagram for CO2 is shown in the figure(Figure 1) .

Part A

What is the phase of CO2 at T=20Cand P=500kPa?

What is the phase of at and ?

gas

Part B

What is the phase of CO2 at T=80C and P=120kPa?

What is the phase of at and ?

Part C

For reasons of economy and convenience, bulk CO2 is often transported in liquid form in pressurized tanks. Using the phase diagram, determine the minimum pressure required to keep CO2 in the liquid phase at 20 C.

solid liquid

gas

7373 5707 516 101 Solid Temperature, TOC) Gas 20 31

Explanation / Answer

from the above graph,

at T=20 oC and P=500kPa

the phase of the CO2 is "gas"

from the above graph,

at T=-80 oC and P=120kPa

the phase of the CO2 is "solid"

the minimum pressure required to keep CO2 in the liquid phase at 20oC is P=5707kPa

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Phase Diagram Homework 1.) On the website there is a phase diagram practice link

Phase Diagram for CO2 The phase diagram for CO2 is shown in the figure(Figure 1)

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Phase Diagram for CO2 The phase diagram for CO2 is shown in the figure(Figure 1)

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