Phase Diagrams, Triple Points and Critical Points Practice Problems

Dry ice is another name for solid carbon dioxide. Determine the minimum external pressure (p₀) required so that the melting of dry ice is observed. If p < p₀, what phase transition sequences will be observed?

At a pressure of 5 atm and a temperature of -60°C, determine the phase in which carbon dioxide exists.

Imagine you are in a laboratory experimenting with water. You carefully control the conditions as the temperature of the water reaches 150°C. What phase will the water be in under a pressure of 1 atm?

At sea level, in what states can H2O exist? Refer to the phase diagram of H2O.

At what range of pressures and temperatures can water exist as a liquid? Refer to the phase diagram of H2O.