Question

Use these data to draw a qualitative phase diagram for . Does sublime at 0.05atm? Explain.

MP at 1atm: 13.96 K

BP at 1atm: 20.39 K

Triple point: 13.95 K and 0.07atm

Critical point: 33.2 K and 13.0atm

Vapour pressure of solid at 10 K: 0.001atm

Short answer

The phase diagram of the explained by the pressure vs temperature. The density of the solid increases than liquid even after the critical point where solid-liquid density are equal.

Step-by-step solution

Enthalpy of Vaporization

The phase diagram is the diagram which shows the change in phase. It tells about the change into all phases – Solid, Liquid and Gaseous.

It represent all the phases and transition are shown by the lines and the area between lines show the whole phase of the molecule.

The critical point can be explained as the point where the density of the different phases becomes equal. The critical point in which the volume of the two phases are same at certain pressure and temperature.

The point can be said as the ‘Triple Point’ where all the threephases are in equilibriumand the phases co-exist with each other.

Numerical Explanation 

The graph based on the different following data:

MP at 1atm: 13.96 K

BP at 1atm: 20.39 K

Triple point: 13.95 K and 0.07atm

Critical point: 33.2 K and 13.0atm

Vapour pressure of solid at 10 K: 0.001atm

Hydrogen can exist in all three-phase and the solid can also exist in many other phases. The phase diagram shows the Pressure vs Temperature of the Hydrogen molecule showing the different phases – Solid, Liquid and Gaseous by using the above data.