Energy
Once manufactured, hydrogen is an energy carrier (i.e. a store for energy first generated by other means). The energy is eventually delivered as heat when the hydrogen is burned. The heat in a hydrogen flame is a radiant emission from the newly formed water molecules. The water molecules are in an excited state on initial formation and then transition to a ground state; the transition unleashing thermal radiation. When burning in air, the temperature is roughly 2000°C.
Read more about this topic: Hydrogen Fuel
Famous quotes containing the word energy:
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—Elaine Heffner (20th century)
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—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)
“Children are intensely invested in getting their way. They will devote more emotional and intellectual energy to winning arguments than parents ever will, and are almost always better rested.”
—Jean Callahan (20th century)