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Question
The phase diagram for CO2 has a triple point at -56.6 C and 5.19 atm, and a critical point at 31.0 C and 73 atm. The solid and gas phases are in equilibrium at -78.7 C and 1.00 atm. Which of the following statements regarding CO2 is/are CORRECT?
1/ Sublimation occurs if the temperature of the solid phase is increased from -79.0 C to 0.0 C at a constant pressure of 2.5 atm.
2/ CO2 is a supercritical fluid at 55 C and 75 atm.
3/ At pressures greater than its critical pressure (73 atm), CO2 will not exist as a solid at any temperature.
A.1 only
B.2 only
C.3 only
D.1 and 2
E.1, 2, and 3
Answer
This answer is hidden. It contains 2 characters.
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