What is the name of the process (vaporization, sublimation, etc) that takes plac

Question

What is the name of the process (vaporization, sublimation, etc) that takes place when:

Look at the phase diagram for co2 in Figure 11.27b. What is the name of the proces sublimation, etc.) that takes place when: a. The CO2 goes from a temperature and pressure of 0 C and 70 atm to a temperature and pressure of 0 C and i atm. The CO2 goes from a temperature and pressure of-50 C and 1 atm to a temperature and pressure of -100 C and 1 atm. The CO2 goes from a temperature and pressure of-80 Cand 5 atm to a temperature and pressure of-80 C and 0.01 atm. d. The CO2 goes from a temperature and pressure of -60 Cand 70 atm to a temperature and pressure of 0 C and 70 atm

Explanation / Answer

(a) the phase corresponding to 0oC and 70 atm is Liquid, and corresponding to 0oC and 1 atm is Gas, according to the phase diagram of CO2.

the name of the process is Vaporization.

(b) the phase corresponding to -500C and 1 atm is Gas, and corresponding to -100oC and 1 atm is solid.

the name of the process is Desublimation/Deposition.

(c) the phase at -80oC and 5 atm is solid, and corresponding to -80oC and 0.01 atm is gas.

the name of process is Sublimation.

(d) the phase corresponding to -60oC and 70 atm is liquid, and corresponding to 0oC and 70 atm is solid.

the process is called Freezing.

(the phase diagram is not visible in the question and standard phase diagram is used to solve the question, hope it helped)

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