H LV <[email protected]> wrote: How much of the energy in a nuclear reaction is actually due to mass > change? A chemical reaction is accompanied by mass change but the change > is so small that it can be ignored so that essentially all the energy is > due to EM forces performing work. >
All forms of energy convert mass to energy in the same amount. Mechanical, chemical or nuclear, it is always exactly according to Einstein. It is impossible to measure the loss of mass with a chemical system because the total energy is so small, but the mass loss per joule is exactly the same as with a nuclear reaction.

