Affecting Factors Of Lattice Energy | CHEMISTRY | JEE | NEET | IIT | By Chintan Sir скачать в хорошем качестве

Affecting Factors Of Lattice Energy | CHEMISTRY | JEE | NEET | IIT | By Chintan Sir

Please watch: "Chemistry Physics New website Launch | CHEMISTRY | NEET | JEE | By Chintan Sir"    • Видео   -~- The lattice energy of a crystalline solid is usually defined as the energy of formation of a crystal from infinitely-separated ions and as such is invariably negative.[note 1] The precise value of the lattice energy may not be determined experimentally, because of the impossibility of preparing an adequate amount of gaseous ions or atoms and measuring the energy released during their condensation to form the solid. However, the value of the lattice energy may either be derived theoretically from electrostatics or from a thermodynamic cycling reaction, the Born–Haber cycle. The two main factors affecting lattice enthalpy are the charges on the ions and the ionic radii (which affects the distance between the ions). Sodium chloride and magnesium oxide have exactly the same arrangements of ions in the crystal lattice, but the lattice enthalpies are very different