Chap8,2 - Chem. 200 Dr. Saidane Lecture Notes CHAPTER 8,...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chem. 200 Dr. Saidane Lecture Notes CHAPTER 8, Part 2 Chemical Bonding BONDS ENERGIES of IONIC COMPOUNDS Lattice Energy In order for atoms to produce ionic compounds they need energy to produce cations and anions from their neutral atoms. The ionization energy of the metal must first be supplied, which makes the metal become a cation by losing its valence shell electrons. These electrons will then be transferred to the nonmetal to produce an anion. This process corresponds to the release of energy (electron affinity). In this process the ionization energy is recovered from the electron affinity of the nonmetal atoms as they form anions. The overall absorption of ionization energy and release of electron affinity results in the lowering of energy of the original atoms. The overall lowering of energy is due to the strong attraction between cations and anions that occurs in the solid ionic compound. The energy difference between ions and atoms is called the lattice energy. Lattice energy is the heat released when the solid lattice forms from gaseous ions . The strength of the interaction is measured by the lattice enthalpy. The lattice enthalpy is large for compounds formed from small, highly charged ions. Lattice enthalpy is
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/09/2011 for the course CHEM 200 taught by Professor Saidane during the Spring '11 term at Mesa CC.

Page1 / 3

Chap8,2 - Chem. 200 Dr. Saidane Lecture Notes CHAPTER 8,...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online