Phase diagram — pressure against temperature for water
The three phase fields of water with the boundaries that separate them, the triple and critical points in numbers, the negatively sloping fusion curve that makes ice float, and the supercritical region beyond 374 °C.
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{ "id": "triple", "type": "star", "label": "Triple point — 0.01 °C, 611.7 Pa", "x": 390, "y": 40, "width": 150, "height": 104, "fill": "#dcfce7", "stroke": "#15803d", "bold": true },
{ "id": "crit", "type": "star", "label": "Critical point — 374 °C, 22.06 MPa", "x": 565, "y": 40, "width": 150, "height": 104, "fill": "#dcfce7", "stroke": "#15803d", "bold": true },
{ "id": "scf", "type": "cloud", "label": "Supercritical fluid — no meniscus", "x": 740, "y": 40, "width": 150, "height": 104, "fill": "#ede9fe", "stroke": "#6d28d9", "bold": true },
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{ "id": "vapourf", "type": "cloud", "label": "Water vapour", "x": 565, "y": 200, "width": 150, "height": 104, "fill": "#dbeafe", "stroke": "#1d4ed8", "bold": true },
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{ "id": "fusion", "type": "line-chart", "label": "Fusion curve — negative slope", "x": 215, "y": 360, "width": 150, "height": 104, "fill": "#fef3c7", "stroke": "#a16207", "bold": true },
{ "id": "vapcurve", "type": "line-chart", "label": "Vaporisation curve", "x": 390, "y": 360, "width": 150, "height": 104, "fill": "#fef3c7", "stroke": "#a16207" },
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{ "id": "freeze", "type": "snowflake", "label": "Freeze-drying works below it", "x": 740, "y": 360, "width": 150, "height": 104, "fill": "#ede9fe", "stroke": "#6d28d9" },
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{ "id": "clap", "type": "clipboard", "label": "Clapeyron: dP/dT = ΔH/(TΔV)", "x": 215, "y": 680, "width": 150, "height": 104, "fill": "#f1f5f9", "stroke": "#475569" },
{ "id": "ice", "type": "iso-cube", "label": "ΔV < 0 on melting ⇒ ice floats", "x": 390, "y": 680, "width": 150, "height": 104, "fill": "#e0f2fe", "stroke": "#0369a1" }
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{ "id": "e11", "source": "crit", "target": "scf", "label": "beyond it", "thickness": 2.5 },
{ "id": "e12", "source": "fusion", "target": "mp", "label": "at 1 atm" },
{ "id": "e13", "source": "vapcurve", "target": "bp", "label": "at 1 atm" },
{ "id": "e14", "source": "fusion", "target": "clap", "label": "slope from", "style": "dashed" },
{ "id": "e15", "source": "clap", "target": "ice", "label": "ΔV is negative", "style": "dashed" },
{ "id": "e16", "source": "subl", "target": "freeze", "label": "lyophilisation", "style": "dashed" },
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