The formula to calculate lattice energy is:
\[ \text{LE} = \frac{K \cdot Q_1 \cdot Q_2}{R} \]
Where:
A lattice energy is defined as the total energy released when two charged gas ions attract and form a solid.
Let's consider an example:
Using the formula to calculate the lattice energy:
\[ \text{LE} = \frac{2.31 \times 10^{-19} \times 1 \times -1}{0.2} = -1.155 \times 10^{-18} \text{ J} \]
This demonstrates that with ion charges of +1 and -1, and a distance of 0.2 nm, the lattice energy is -1.155 x 10^-18 J. ✅
