The ionization energy of H2 is 1488 kJ/mol. How strong of a DC electrostatic field would be need to ionize H2 molecules all at a distance 'd' from the source of the field? What I am asking is how to convert the known unit (joule) into a measure of an electrostatic field since electric fields are expressed in newtons per coulomb or volts per meter. Would this be easier to do if the ionization energy was in eV rather than in joules? (It is approximately 15.4 eV) I need to know how to do this for a personal project, not for homework. Thank you.