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Liquid hydrogen (H 2 (l)) is the liquid state of the element hydrogen.Hydrogen is found naturally in the molecular H 2 form. [4]To exist as a liquid, H 2 must be cooled below its critical point of 33 K.
This is a list of the various reported boiling points for the elements, with recommended values to be used elsewhere on Wikipedia. ... 1 H hydrogen (H 2) use: 20.271 ...
Boiling point (H 2) 20.271 K (− ... the only emission at the point of use is water vapor. [19] ... Liquid hydrogen – Liquid state of the element hydrogen;
1 H hydrogen; use (T/K) 15 20 CRC.a (T/°C ... liquid, m.p. to 1000 K: log ... The temperature at standard pressure should be equal to the normal boiling point, ...
Boiling point (°C) K b (°C⋅kg/mol) Freezing point (°C) K f (°C⋅kg/mol) Data source; Aniline: 184.3 3.69 –5.96 –5.87 K b & K f [1] Lauric acid:
Water boiling at 99.3 °C (210.8 °F) at 215 m (705 ft) elevation. The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid [1] [2] and the liquid changes into a vapor.
With a wide liquid range between -39 °C (melting point) and 390 °C (boiling point) and a hydrogen storage density of 6.2 wt% dibenzyltoluene is ideally suited as LOHC material. [61] Formic acid has been suggested as a promising hydrogen storage material with a 4.4wt% hydrogen capacity. [62]
Since "normal" room-temperature hydrogen is a 3:1 ortho:para mixture, its molar residual rotational energy at low temperature is (3/4) × 2Rθ rot ≈ 1091 J/mol, [citation needed] which is somewhat larger than the enthalpy of vaporization of normal hydrogen, 904 J/mol at the boiling point, T b ≈ 20.369 K. [10] Notably, the boiling points of ...