# Potential energy of the human body if all its atoms were split

I am working on a sci-fi story in which a character has control over matter on the atomic level (think Dr. Manhattan from Watchmen). In thinking up potential tragedies for this character I thought, "Would splitting all the atoms in the human body simultaneously result in any significant explosion?"

I threw 200 pounds into a calculator site and got out 8.1534e+18 joules or 1.9487e+3 megatons of TNT.

Is this use of e=mc^2 valid, assuming the atom splitting could be done through means other than the typical chain reaction that takes place in warheads?

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You know, on SO we don't tend to down vote without an explanation. –  Logarr Feb 11 '14 at 4:02

The only way to possibly obtain the full $8.1\times 10^{18}\text{ J}$ from a 200-pound human body in anything resembling an explosion would be by annihilating it with a corresponding body of antimatter in a very controlled manner.