Explore freezing, melting, evaporation, and condensation. Watch molecules behave at the micro level and observe macro-scale ice/water volume changes driven by temperature, altitude, and heat energy.
At 0°C and standard pressure, water can exist as ice, liquid water, or both simultaneously. This is the freezing/melting point — the temperature at which the ice-water phase transition occurs. Adding heat melts ice; removing heat freezes water.
Phase transitions require or release energy (latent heat) without changing temperature. At 0°C, all added heat goes into breaking hydrogen bonds in ice before the temperature rises again.
| Time | Temp (°C) | Ice (cm³) | Water (cm³) | Steam (cm³) | Altitude (m) | Phase |
|---|---|---|---|---|---|---|
| Run the simulation to record data | ||||||