In the words of James Burke's, "Connections".
The Inversion Temperature:
" the 'normal' effect of cooling when a gas expands takes place below that temperature,
above that temperature it heats under expansion."
Gas Inversion Temp Deg K
Space 0-3
Helium 51
Hydrogen 205 -90.67 F
Neon 242
Nitrogen 621 658.13 F
Argon 723 841.73 F
Krypton 727
Oxygen 893 1147.73
Xenon 1427
Zero Deg C = 273 Deg K
Zero Deg F = 255 Deg K
Handy Conversion calculators.
Fred
