Why can’t we just harvest the oxygen in H20 and breathe under water
In: Chemistry
Breaking the bond between H2 and O is very energy intensive. It takes less energy to get the CO2 out of the air (wash it) and rebreath it with a little amount of new O2. This is done with so called rebreather diving devices. They allow to stay for >12h under water.
And also you can not breath pure O2, it will be toxic if you go down for only 7 meters.
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