Electron Affinity Calculator

Formula

The formula to calculate the electron affinity is:

\[ \text{EA} = \text{Ee} - \text{Ea} \]

Where:

\(\text{EA}\) is the Electron Affinity
\(\text{Ee}\) is the energy of the system with an electron
\(\text{Ea}\) is the energy of the anion

What is Electron Affinity?

Electron affinity refers to the amount of energy released when an electron is added to a neutral atom or molecule to form a negative ion. It is a measure of the tendency of an atom or molecule to capture an electron.

Example Calculation 1

Let's assume the following values:

Energy of the System with an Electron (Ee) = -200 kJ/mol
Energy of the Anion (Ea) = -150 kJ/mol

Using the formula:

\[ \text{EA} = -200 - (-150) = -200 + 150 = -50 \]

The Electron Affinity is -50 kJ/mol.

Example Calculation 2

Let's assume the following values:

Energy of the System with an Electron (Ee) = -300 kJ/mol
Energy of the Anion (Ea) = -250 kJ/mol

Using the formula:

\[ \text{EA} = -300 - (-250) = -300 + 250 = -50 \]

The Electron Affinity is -50 kJ/mol.