Question

A phase diagram is a temperature-pressure plot that summarizes the conditions under which a substance exists as a solid, liquid, or gas. The curves that separate the phases are known as phase boundaries. Each phase boundary represents the equilibrium between the phases on either side of the curve. Identify the components of the phase diagram of water.

Drag the appropriate labels to their respective targets.

Answer 1

Concepts and reason

In the given phase diagram, check the phases on either side of the line and assign the name for the curve.

Fundamentals

Phase diagram is a graphical representation of variation of temperature with pressure for various phases of a substance. The graph has temperature on x-axis and pressure on y-axis.

Consider the phase diagram for a one component system given below:

In the given phase diagram,

Point A represents the triple point, where all the three phases exist together.

At point D only solid phase exists.

At point E only liquid phase exists.

At point F only gas phase exists.

Line AC represents phase transition from solid to liquid and vice versa at different temperatures and pressure. Therefore, this line represents the melting and freezing process.

Line AB represents phase transition from gas to liquid and vice versa at different temperatures and pressure. Therefore, this line represents the vaporization and condensation process.

Line AO represents phase transition from solid to gas and vice versa at different temperatures and pressure. Therefore, this line represents the sublimation and deposition process.

At ${{\rm{P}}_1}$ and ${{\rm{T}}_1}$ , the substance exists in solid phase at point D.

Consider the phase diagram given below:

Here,

Point A represents supercritical fluid.

Point C represents critical temperature.

Point D represents vaporization curve.

Consider the phase diagram given below:

Here,

Point B represents fusion curve.

Point E represents sublimation curve.

Consider the phase diagram given below:

Here, point F represents the triple point.

Ans: