Lesson: Molecular BondsPhysics
In this lesson, we will learn how to calculate the dissociation energies of different ionic, covalent, and van der Waals molecular bonds.
Sample Question Videos
Potassium chloride is a molecule formed by an ionic bond. At equilibrium separation, the atoms are apart. Determine the electrostatic potential energy of the atoms given that coulomb’s constant is N⋅m2/C2. Give your answer in electron volts (eV).
Potassium fluoride () is a molecule formed by an ionic bond. At equilibrium separation the atoms are apart. Determine the electrostatic potential energy of the atoms. The electron affinity of is 3.40 eV and the ionization energy of is 4.34 eV. Determine dissociation energy. (Neglect the energy of repulsion.)
What value of the repulsion constant, , gives the measured dissociation energy of 701 kJ/mol for ? The molar mass of is 74.55 g/mol and its density is 1.98 g/cm3. Coulomb’s constant is N⋅m2/C2 and Madelung constant 1.7476.