The phase diagram for CO₂ is given below.The triple point is at 5.1 atm and 217 K. What happens if CO₂(l)at 30 atm and 450 K is released into a room at 1 atm and 298 K?

Question

Quizplus · Accepted Answer

According to the phase diagram, at 30 atm and 450 K, CO₂ is in the liquid phase above its boiling point (which is below 450 K at 30 atm). When the liquid is released into a room at 1 atm and 298 K, the pressure is decreased below the liquid's vapor pressure at that temperature, causing the liquid to boil and vaporize until equilibrium is reached between the liquid and vapor phases. Therefore, the best choice is A, the liquid vaporizes.

The Phase Diagram for CO2 Is Given Below

The Phase Diagram for CO₂ Is Given Below