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Originally Posted by d*d
No, energy cannot be created or destroyed, the bomb does not output more energy than was input, that is impossible - and that is what cold fusion implies
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You are right that energy must be conserved, but that is not what I was saying. Fusion bombs are jumpstarted by fission bombs because the fusion reaction requires high temperatures and intense pressures. Viewing it from the standpoint of a reaction you input the energy of a fission bomb and it will "produce" several hundred times that energy in output. Of course this is all extracted from the tritium, deuterium, or lithium used as fuel but the point is that as a reaction that energy was unavailable without a significant energy input.
Cold fusion does not imply that more energy can be extracted than is input, it is the claim that a fusion reaction can be caused at temperatures and perhaps pressures lower than is conventionally understood possible. While skepticism is warrented for their process actually creating the conditions required for fusion, the term "cold fusion" does not itself imply breaking the laws of thermodynamics.