3 ms·
Yes. H2 is easily dissociated by UV. (Re)combination of 2H0 (two neutral hydrogen atoms) can't happen in the gas phase without a third body to take away the rec
by ridgeguy 7y ago
Yes. H2 is easily dissociated by UV. (Re)combination of 2H0 (two neutral hydrogen atoms) can't happen in the gas phase without a third body to take away the recombination energy. Quantum mechanics again. So there has to be a third thing around (another atom, molecule, or surface) to make H2 out of 2H0.