Liquid band
Most molecules begin in a compact slab.
Project 001
When Hydrogen Bonds Let Go
I started with something familiar but still molecular: water molecules leaving a heated liquid slab.
What to watch
Blue molecules stay near the original liquid slab. Orange molecules move into the vapor space as the slab becomes more diffuse.
A visual demonstration of molecular motion, not a precision boiling-point calculation.
The molecular story
Interface loosens
Heating increases molecular motion and makes the slab boundary less sharp.
Molecules escape
More waters occupy the vapor region above and below the original slab.
How I made it
I simulated a TIP4P/2005 water slab in OpenMM using a finite box with vapor space along the vertical direction. The animation focuses on the high-temperature case where the vapor region is easiest to see.
Model note
A nanoscale simulation slab is not the same as a macroscopic pot of boiling water. I use this project to show molecular motion and phase-like behavior, not to report a measured boiling point or vapor pressure.