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Home/Chemistry/Water P–T Phase Diagram

Water P–T Phase Diagram

This interactive simulator explores Water P–T Phase Diagram in Chemistry. Qualitative fusion, sublimation, vapor pressure up to critical point — probe labeled regions (pedagogical curves). Use the controls to change the scenario; watch the visualization and any graphs or readouts to connect the model with lectures, labs, and homework.

Who it's for: Best once you already know the basic definitions and want to build intuition. Typical context: Chemistry.

Key terms

  • water
  • phase
  • diagram
  • water phase diagram
  • chemistry

State probe

380 K
5.2

Measured values

Region (schematic)Liquid
log₁₀ P_sat(T) rough3.69
log₁₀ P_c7.34

How it works

Qualitative P–T diagram for H₂O: ice–liquid fusion line with negative slope, sublimation, vapor pressure up to the critical point (≈647 K, 22.064 MPa). Boundaries are stylized; move the probe to label the region.

Key equations

Clapeyron: dP/dT = ΔS/ΔV — water expands on freezing (ΔV < 0) ⇒ negative dP/dT along fusion.