Calculate the overall change in energy when an electron is transferred from a sodium atom, Na, to a chlorine atom, Cl, to form a sodium ion, Na⁺, and chlorine ion, Cl^-. The first ionization energy of sodium is 5.14 eV. The electron affinity of chlorine is +3.62 eV. A) 1.52 kJ mol^-1 B) 845 kJ mol^-1 C) 147 kJ mol^-1 D) 495 kJ mol^-1

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The overall change in energy is the sum of the first ionization energy of sodium and the electron affinity of chlorine. The first ionization energy of sodium is 5.14 eV, and the electron affinity of chlorine is +3.62 eV. Therefore, the overall change in energy is 5.14 eV + 3.62 eV = 8.76 eV. Converting to kJ/mol, we get 8.76 eV * (1.602 x 10^-19 J/eV) * (1 kJ/1000 J) * (1 mol/6.022 x 10^23 atoms) = 147 kJ/mol.

Calculate the Overall Change in Energy When an Electron Is