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Chemistry
States of matter
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Choose a substance
Set initial state
Choose Heat to melt the solid
Heating and cooling evolve over time; phase buttons set a sample configuration.
Watch the process
Inside the container
Temperature
K
Reading the model
Heat and volume affect particle motion, spacing and collisions. Do not infer the phase from a single temperature alone.
Model notes
- This simplified two-dimensional particle model uses Lennard–Jones interactions, thermostats and charge interactions for water.
- Temperature does not plateau at phase changes as in a macroscopic experiment. Water interactions are adjusted to show gaps in two-dimensional ice.
- Relative sizes use van der Waals radii. Few particles and simplified interactions do not form a precise quantitative phase diagram.