Change of State

Latent heat During a change of state, temperature stays constant while energy breaks or forms intermolecular bonds. The flat sections on the graph show where latent heat is absorbed.

Heating Curve

Substance

Current Readings

Temperature

— °C

Time

0 s

Current State

—

Instructions:

  1. Select a substance from the dropdown
  2. Click Start Heating to begin the experiment
  3. Watch the particle model change as the substance changes state
  4. Observe the flat sections on the heating curve — this is where latent heat is being absorbed
  5. Note the melting point and boiling point of the substance
  6. Click Reset to try a different substance
  7. Think: Why does temperature not rise during a change of state?
Reading recorded!