O hai, Physics Forums. I've came up with an idea, an amazing experiments which turns an invisible gas into butter. It may not be cheap, but could be a great way to motivate students into chemistry. Putting some pieces together in Chemistry class the idea jumped in. My main language is not English, so I made a drawing of the transformation of the buthane troughout the experiment. (I have no idea what the names of the compunds are in English). I've been told it is possible, not exactly with these compounds, but it is supposed to be possible. So, I need someone to tell me how, or at least if it can be done. I hope I don't mess up with any dangerous chemical in the list of prohibition of the forum. Edit: link deleted, if you want to discuss it here, post it here.