Question

O ELECTRONIC STRUCTURE Understanding the definitions of ionization energy and el... Consider the following data for scandium: atomic mass 44.956 - mol 1.36 electronegativity electron affinity 18.1 k mol kJ ionization energy 633.1 mol heat of fusion 16. You may find additional useful data in the ALEKS Data tab. Does the following reaction absorb or release energy? (1) Sc** (s) + e - Sc" (g) O release absorb Can't be decided with the data given. yes Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? no If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (1): J/mol Does the following reaction absorb or release energy? (2) Sc (8) + e + Sc(e) release absorb Can't be decided with the data given. yes Ono Is it possible to calculate the amount of energy absorbed or released by reaction (2) using only the data above? If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (2): kJ/mol Explanation Check

Answer 1

Whenever a cation accepts an electron its charge gets reduced, ion gets stabilized, energy is thus RELEASED.

NO , we cannot determine with this as this is not mentioning E Affinity for Sc cation but for Sc atom(neutral) , which will be different.

Same case here also when monopositive cation gets neutralised it gets neutral,stable energy is released.

YES, we can calculate it from the data but in opposite way.

Ionisation enthalpy is energy is energy required for removing an electron.

EQUATION IS : Sc = Sc⁺ + e^- and the energy change is 633.1 KJ/mol

Now equation 2 is just the opposite of this equation. So energy change is -633.1 KJ/mol