Gallium melting plateau at standard pressure
This is the temperature at which pure gallium changes from solid to liquid under normal atmospheric pressure.
Also known as: gallium melting point
How big is it?
29.76 °C · equilibrium melting temperature near 101 kPa
Also 85.58 °F
Equilibrium melting temperature near 101 kPa · specified
Typical recorded range: 29.75 °C to 29.77 °C.
A little perspective
Gallium melting plateau at standard pressure vs Water triple point: temperature comparison
The equilibrium melting temperature near 101 kPa of the melting plateau of gallium at standard pressure is 29.75 K higher than the water triple point.
This is the temperature at which pure gallium changes from solid to liquid under normal atmospheric pressure.
The water triple point is the unique temperature and pressure at which water can exist simultaneously as solid, liquid, and vapour in equilibrium.
Measurements, assumptions & sources +
Gallium melting plateau at standard pressure
Equilibrium melting temperature near 101 kPa: 29.76 °C; specified; range 29.75 °C–29.77 °C.
Gallium melts at about 302.9146 K (29.7646 °C) near standard pressure. Purity and pressure affect a realised plateau.
The marked equilibrium melting temperature near 101 kPa is calibrated. Unmeasured illustration details are representative.
Water triple point
Triple-point temperature: 0.01 °C; specified.
The triple point of water is 273.16 K for a specified isotopic composition at its equilibrium pressure. It is distinct from ordinary freezing water at atmospheric pressure.
IAPWS — Fundamental physical constants of water
The marked triple-point temperature is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 29.76 °C
We compare the equilibrium melting temperature near 101 kPa of the melting plateau of gallium at standard pressure. This value follows a stated specification; check its scope in the notes. The recorded range is 29.75 °C to 29.77 °C.
Gallium melts at about 302.9146 K (29.7646 °C) near standard pressure. Purity and pressure affect a realised plateau.
The picture identifies the subject; the diagram compares the recorded values. How calibrated comparisons work →
Recorded properties
Dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 29.76 °C | 29.75 °C to 29.77 °C | specified |
Around this scale
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Nearest lower valueTemperatureRoom temperature20 °CTemperatureRoom temperature describes indoor air conditions generally considered comfortable for people and suitable for ordinary activities.Around the same scaleTemperatureA warm summer day30 °CTemperatureA warm summer day is weather with outdoor air noticeably hotter than average, typical of summer in temperate regions.Nearest higher valueTemperatureHuman body temperature37 °CTemperatureHuman body temperature is the internal temperature maintained by a healthy person under normal conditions.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- NIST — ITS-90 fixed pointsGallium melting-point fixed point near 302.9146 K.
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TemperatureRoom temperature20 °CRoom temperature describes indoor air conditions generally considered comfortable for people and suitable for ordinary activities.TemperatureHuman body temperature37 °CHuman body temperature is the internal temperature maintained by a healthy person under normal conditions.TemperatureWater triple point0.01 °CThe water triple point is the unique temperature and pressure at which water can exist simultaneously as solid, liquid, and vapour in equilibrium.TemperatureA warm summer day30 °CA warm summer day is weather with outdoor air noticeably hotter than average, typical of summer in temperate regions.TemperatureA 39 °C reading39 °CA fever is a temporary rise in body temperature, commonly associated with the immune system responding to infection or inflammation.TemperatureFreezing water0 °CFreezing water is liquid water at the temperature where it begins to turn into ice under normal pressure.TemperatureA freezing winter day-10 °CA freezing winter day is weather cold enough for outdoor water to turn to ice.TemperatureBoiling water100 °CBoiling water is water heated until it changes rapidly from liquid to steam at standard atmospheric pressure.