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It does not give the whole event, but omits an essential part of it, and now we write it: 2H + O = 2H O + 293,000 J., which means: The matter and energy of 2 gram molecules of hydrogen, and the matter and energy of 1 gram molecule of oxygen, combine to the matter and energy of 2 gram molecules of water vapor and 293,000 joules, or units, of free energy.
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