<P> Physical quantities measured in J mol usually describe quantities of energy transferred during phase transformations or chemical reactions . Division by the number of moles facilitates comparison between processes involving different quantities of material and between similar processes involving different types of materials . The meaning of such a quantity is always context - dependent and, particularly for chemical reactions, is dependent on the (possibly arbitrary) definition of a' mole' for a particular process . </P> <P> For convenience and due to the range of magnitudes involved these quantities are almost always reported in kJ mol rather than in J mol . For example, heats of fusion and vaporization are usually of the order of 10 kJ mol, bond energies are of the order of 100 kJ mol, and ionization energies of the order of 1000 kJ mol . </P> <P> 1 kJ mol is equal to 0.239 kcal mol or 1.04 × 10 eV per particle . At room temperature (25 ° C, 77 ° F, or 298.15 K) 1 kJ mol is equal to 0.4034 k B T (\ displaystyle k_ (B) T). </P> <Table> <Tr> <Td> </Td> <Td> This standards - or measurement - related article is a stub . You can help Wikipedia by expanding it . <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> </Table>

1 electron volt is equal to how many kilo joule per mole
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