The key idea
Start with the central idea, then test it against a concrete element or example. A scientific model is useful when we know what it explains — and where its limits are.
Why it matters
A phase diagram maps which thermodynamic phase is stable as variables such as temperature and pressure change.
A picture to remember
Lines mark coexistence conditions; special points such as triple and critical points summarize remarkably rich behaviour in a compact picture.
The key idea
Start with the central idea, then test it against a concrete element or example. A scientific model is useful when we know what it explains — and where its limits are.
The key idea
A phase diagram maps which thermodynamic phase is stable as variables such as temperature and pressure change.
A phase diagram maps which thermodynamic phase is stable as variables such as temperature and pressure change.