energi / molekyl
| Smältvärme för is | 80 cal / g
| 0.06 eV
| Ångbildningsvärme | 539 cal / g | 0.42 eV
| Reaktion | H2(g) + 1/2 O2(g) -> H2O(l) 286 kJ/mol | 2.97 eV
| |
"Rätt" storleksordning för atomfysiker:
Väte: Elektron bunden till proton med 13.6 eV i grundtillståndet.
"So long as no energy is given off, it cannot be observed. It is as though a man who is fabulously rich should never spend, nor give away, a cent; no one could tell how rich he was.
Ges bort i Kärnreaktioner: MeV
(kärnvapen - inte atombomb...)
Om fission: The atom M is a rich miser who, during his life gives away no money (energy). But in his will he bequeaths his fortunes to his sons M' and M*, on condition that they give to the community a small amount, less than 1/1000 of the whole estate (energy or mass). The sons together have somewhat less than the father had. But the part given to the community, though relatively small, is still so enormously large (considered as kinetic energy) that it brings with it a great threat of evil. Averting that threat has become one of the most urgent problems of our time.