Explosive boiling

The spinodal line on right is the boundary of absolute instability of a solution to decomposition into multiple phases.

During this time heterogeneous evaporation occurs in the substance with bubbles nucleating from impurity sites, surfaces, grain boundaries etc.

System then shifts away from the binodal and continues to follow the red curve and thus approaches towards spinodal.

Near the critical temperature thermodynamic properties like specific heat, density varies rapidly as shown on the figure at right.

Later explosive boiling was found to occur while using ultra fast femtosecond laser ablation.

This figure shows the binodal and spinodal and the red curve shows a typical heating cycle, this shows the concept of explosive boiling.
This figure shows the change of thermodynamic properties near the critical point