{"action":"opened","issue":{"url":"https://api.github.com/repos/NathanKell/ModularFuelSystem/issues/125","labels_url":"https://api.github.com/repos/NathanKell/ModularFuelSystem/issues/125/labels{/name}","comments_url":"https://api.github.com/repos/NathanKell/ModularFuelSystem/issues/125/comments","events_url":"https://api.github.com/repos/NathanKell/ModularFuelSystem/issues/125/events","html_url":"https://github.com/NathanKell/ModularFuelSystem/issues/125","id":123582054,"number":125,"title":"Hydrogen is magic","user":{"login":"stratochief66","id":10169695,"avatar_url":"https://avatars.githubusercontent.com/u/10169695?v=3","gravatar_id":"","url":"https://api.github.com/users/stratochief66","html_url":"https://github.com/stratochief66","followers_url":"https://api.github.com/users/stratochief66/followers","following_url":"https://api.github.com/users/stratochief66/following{/other_user}","gists_url":"https://api.github.com/users/stratochief66/gists{/gist_id}","starred_url":"https://api.github.com/users/stratochief66/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/stratochief66/subscriptions","organizations_url":"https://api.github.com/users/stratochief66/orgs","repos_url":"https://api.github.com/users/stratochief66/repos","events_url":"https://api.github.com/users/stratochief66/events{/privacy}","received_events_url":"https://api.github.com/users/stratochief66/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-12-23T00:42:55Z","updated_at":"2015-12-23T00:42:55Z","closed_at":null,"body":"TIL:\r\n\r\npage 107 of Ignition!, apparently cooling hydrogen also has to change between ortho and para states, which emits 1.5x again as much energy to drop to the lower energy version. I need to find a source about how this progresses as liquid hydrogen heats up and boils off.\r\n\r\nEffectively as liquid hydrogen is cooled to a liquid it goes through an additional transition that emits heat. As hydrogen is heated, this transition would occur in reverse, absorbing heat energy just like vapourizing hydrogen does. Very cool.\r\n\r\nhttps://en.wikipedia.org/wiki/Spin_isomers_of_hydrogen"}}