Chemistry newb here. I've been reading about how energy is released when new chemical bonds are formed but it's hard to find info on how that typically manifests itself (besides that it's via heat). I read somewhere that the valence electrons will move into lower energy orbits during a bond, but I thought that always created a photon. How and where is the heat actually "created?". When two h atoms form h2, does the new molecule start moving faster (discounted for increased mass)? If you can attempt to explain intuitively I'd appreciate it. A bunch of equations without context will be lost on me. Thanks in advance!
Edit: I don't quite understand why I have to edit my question when someone else seems to think my question has been answered, but here I am. That answer does not address my question about what happens if their are no surrounding molecules.
Edit 2: Now my question is closed for being too broad? What is too broad about the original question? How can I be more specific than "When 2 atoms of H combine to form H2, how does the decrease in energy manifest itself if there are no surrounding molecules?". I honestly don't know. If I seem annoyed it's because I constantly come across answers to this site on Google that have been closed because there is supposedly an answer to that question, but upon further investigation the other answer simply does not answer the question. We're trying to learn here, why make it so hard? I get that answering the same question over and over is annoying, but i always do my research before asking and had already seen the questions offered as possible answers. Can someone at least explain why this question is too broad? Maybe I'll at least learn something by understanding why it's too broad.