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== Temperaturskala ==
Ved en international aftale i 1954 besluttede man, at fastlægge [[Kelvin]]skalaen ved at vands trippelpunkt ligger ved 273,16 K. Nulpunktet for Kelvinskalaen er det [[Absolut nulpunkt|absolutte nulpunkt]].
'''Tabel over trippelpunkter'''
Substance T (K) P (kPa*)
Acetylene 192.4 120
Ammonia 195.40 6.076
Argon 83.81 68.9
Butane[5] 134.6 7 × 10−4
Carbon (graphite) 4765 10132
Carbon dioxide 216.55 517
Carbon monoxide 68.10 15.37
Chloroform[6] 175.43 0.870
Deuterium 18.63 17.1
Ethane 89.89 8 × 10−4
Ethanol[7] 150 4.3 × 10−7
Ethylene 104.0 0.12
Formic acid[8] 281.40 2.2
Helium-4 (lambda point) 2.19 5.1
Hexafluoroethane[9] 173.08 26.60
Hydrogen 13.84 7.04
Hydrogen chloride 158.96 13.9
Iodine[10] 386.65 12.07
Isobutane[11] 113.55 1.9481 × 10−5
Mercury 234.2 1.65 × 10−7
Methane 90.68 11.7
Neon 24.57 43.2
Nitric oxide 109.50 21.92
Nitrogen 63.18 12.6
Nitrous oxide 182.34 87.85
Oxygen 54.36 0.152
Palladium 1825 3.5 × 10−3
Platinum 2045 2.0 × 10−4
Sulfur dioxide 197.69 1.67
Titanium 1941 5.3 × 10−3
Uranium hexafluoride 337.17 151.7
Water 273.16 0.6117
Xenon 161.3 81.5
Zinc 692.65 0.065
[[Kategori:Stoffaser]]
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