Chapter 12, Problem 81A

Interpretation Introduction

Interpretation:

Solid, liquid, gas, triple point and critical point must be labeled in the given phase diagram.

Concept introduction:

Phase diagram is a graphical representation of phase change with pressure and temperature.

Triple point is the condition at which solid, liquid and gas coexist.

Critical point is the temperature at which liquid is in equilibrium with vapor.

Answer to Problem 81A

Solid, liquid, gas, triple point and critical points are labeled on the phase diagram.

Explanation of Solution

As can be seen from the phase diagram solid, liquid and gas phase are separately shown. Along X-axis and Y-axis temperature and pressure are plotted. Triple point is the black dot where all the solid, liquid and gas lines intersect each other. This point represents that all the phase are present at this point. Critical temperature is shown as the boundary of liquid and gas as at critical point liquid is in equilibrium with gas.

Conclusion

Phase diagram is a graphical representation of phase change of a substance along with pressure and temperature.