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? Sublimation occurs if the temperature of the solid phase is increased from -79.0 °C to 1. 0.0 °C at a constant pressure of 2.5 atm. 2. CO2 is a supercritical fluid at 55 °C and 75 atm. At pressures greater than its critical pressure (73 atm), CO2 will not exist as a solid at 3. any temperature.

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