Ok, I’ll let you lead on this one. Give me a link that proves your superiority.
Not my job. Look it up, you’ve got a computer. If you want a clue, start by doing a search on the Joule-Thompson effect.
By the way, I apologize for the “stupidity” remark. The properties of hydrogen and helium run counter to what we have been led to believe by our general science classes, so lack of informed opinion would have been a better choice of words. I spent 25 years in chemistry of hydrocarbons and dealt with Hydrogen on a daily basis. No need for me to get snippy.