Lattice Energy Practice

Front

What is lattice energy?

Back

Lattice energy is the amount of energy released when gaseous ions combine to form an ionic solid. It is also the energy required to separate one mole of a solid ionic compound into its gaseous ions.

Front

Which factors affect lattice energy?

Back

Lattice energy is affected by the size of the ions and the charges of the ions. Smaller ions and ions with higher charges result in greater lattice energy.

Front

How does ionic size affect lattice energy?

Back

As the size of the ions increases, the lattice energy decreases because larger ions are further apart, reducing the electrostatic attraction between them.

Front

How does ionic charge affect lattice energy?

Back

Higher charges on ions lead to greater lattice energy because the electrostatic attraction between oppositely charged ions increases.

Front

Which ionic compound has a greater lattice energy: NaCl or KCl?

Back

NaCl has a greater lattice energy than KCl because Na+ is smaller than K+, leading to stronger electrostatic attraction.

Front

Order the following compounds by decreasing lattice energy: Al2S3, BaI2, KBr, NaF, MgO.

Back

Al2S3, MgO, BaI2, NaF, KBr.

Front

Which has a lower melting point: BeO or BeS?

Back

BeS has a lower melting point than BeO due to weaker ionic bonds.

Front

Which has a higher boiling point: NaCl or NaF?

Back

NaF has a higher boiling point than NaCl due to stronger ionic bonds from the higher charge of F- compared to Cl-.

Front

What is the relationship between lattice energy and melting point?

Back

Generally, compounds with higher lattice energy have higher melting points due to stronger ionic bonds.

Front

What is the significance of lattice energy in ionic compounds?

Back

Lattice energy helps predict the stability, melting point, and solubility of ionic compounds.