In a chemical reaction, what is defined as the difference between the potential energy of the products and the potential energy of the reactants? 1)activation energy 2)ionization energy 3)enthalpy 4)heat of vaporization

i think it's c. i'm not sure but i think so.

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl