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Boiling point (H 2) 20.271 K (− ... Hydrogen is a chemical element; ... When used in fuel cells, hydrogen's only emission at point of use is water vapor, ...
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 ...
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.
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:
1 H hydrogen; use (T/K) 15 20 CRC.a ... should be equal to the normal boiling point, ... Thermodynamic properties of carbon up to the critical point". Carbon ...
The boiling point of a substance is the temperature at which the vapor pressure of a liquid ... Simple carboxylic acids dimerize by forming hydrogen bonds between ...
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 ...
For many years hydrogen has been stored as compressed gas or cryogenic liquid, and transported as such in cylinders, tubes, and cryogenic tanks for use in industry or as propellant in space programs. The overarching challenge is the very low boiling point of H 2: it boils around 20.268 K (−252.882 °C or −423.188 °F). Achieving such low ...