Hydrogen normal boiling point
Hydrogen normal boiling point is the temperature at which hydrogen changes from a liquid to a gas at standard atmospheric pressure.
How big is it?
20.27 K
Also -423.2 °F
Temperature · specified
A little perspective
Hydrogen normal boiling point is 16.05 K warmer than Boiling helium.
Boiling helium: Boiling helium is helium in its liquid state at its normal boiling point under standard atmospheric pressure.
Measurements, assumptions & sources +
Hydrogen normal boiling point
A curated hydrogen normal boiling point comparison anchor. The representative value and any stated range preserve the backlog measurement convention; operating or experimental conditions can change real observations.
Defined examples — our methodology
The marked temperature is calibrated. Unmeasured illustration details are representative.
Boiling helium
Approximate normal boiling point of helium at one atmosphere.
NIST Chemistry WebBook — Helium phase data
The marked temperature is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 20.27 K
For comparison, this page uses temperature. The record labels this value specified, so the stated convention rather than an inferred average controls the comparison.
A curated hydrogen normal boiling point comparison anchor. The representative value and any stated range preserve the backlog measurement convention; operating or experimental conditions can change real observations.
The identifying illustration and the numerical comparison remain separate. How calibrated comparisons work →
Recorded properties
Hydrogen normal boiling point dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 20.27 K | Not recorded | specified |
Around this scale
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These links use compatible temperature records, ordered around the selected value.
Nearest lower value · TemperatureBoiling helium4.22 KBoiling helium is helium in its liquid state at its normal boiling point under standard atmospheric pressure.
Around the same scale · TemperatureCosmic microwave background2.725 KThe cosmic microwave background is faint thermal radiation filling the universe, left over from the early stages after the Big Bang.Nearest higher value · TemperatureNeon normal boiling point27.1 KNeon normal boiling point is the temperature at which neon transitions from liquid to gas under standard atmospheric pressure.Sources and method
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The source records and measurement method remain available for inspection.
There’s always another scale
Follow your curiosity.
TemperatureBoiling helium4.22 KBoiling helium is helium in its liquid state at its normal boiling point under standard atmospheric pressure.TemperatureCosmic microwave background2.725 KThe cosmic microwave background is faint thermal radiation filling the universe, left over from the early stages after the Big Bang.TemperatureAbsolute zero0 KAbsolute zero is the lowest temperature permitted by thermodynamics, where a system has the least thermal energy available to it.TemperatureUltracold atom cloud1 × 10⁻⁷ KAn ultracold atom cloud is a collection of atoms cooled to temperatures near absolute zero, used in advanced physics experiments.TemperatureBoiling nitrogen77.36 KBoiling nitrogen is nitrogen gas produced when liquid nitrogen is heated at normal atmospheric pressure.TemperatureNeon normal boiling point27.1 KNeon normal boiling point is the temperature at which neon transitions from liquid to gas under standard atmospheric pressure.TemperatureSuperfluid helium lambda point2.17 KThe superfluid helium lambda point is the temperature at which helium-4 transitions from a normal liquid to a superfluid state.TemperatureDry ice sublimation point-78.5 °CThe dry ice sublimation point is the temperature at which solid carbon dioxide turns directly into gas at standard atmospheric pressure.