The binding energy in a chlorine molecule is 243 kJ / mol. The ionization energy of a chlorine atom is 13 eV

| September 8, 2021 | education

The binding energy in a chlorine molecule is 243 kJ / mol. The ionization energy of a chlorine atom is 13 eV (1 eV = 96500 J / mol) To convert a certain portion of molecular chlorine into cl + ions, it is necessary to spend 3527 kJ of energy. Indicate the mass of this portion

In order to convert molecular chlorine and chlorine ions, it is necessary first to break the bond between the molecules, and then to ionize the chlorine atoms.
Total energy expended = E of ionization + E of bond = 1254500 + 243 = 1254743 kJ / mol
E ionization = 13 * 96500 = 1254500 kJ / mol
Calculate the amount of Chlorine
n Сl = Energy expended / total energy = 3527/1254743 = 0.00281 mol
and the mass of chlorine molecules
mass = n * molar mass = 0.00281 * (35.5 * 2) = 0.1996 (g)



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