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To help compare different orders of magnitude we list here energies between 10-21 joules and 10-20 joules (0.0062 and 0.062 eV). Weaker energies 1.602 × 10-21 J -- 0.01 eV 4.37 × 10-21 J (0.0273 eV) -- Average kinetic energy of a molecule at room temperature Stronger energies External link Conversion Calculator for Units of ENERGY (http://www.ex.ac.uk/cimt/dictunit/ccenrgy.htm)