Chapter 7 Chemical Bonding and Molecular Geometry
Chapter 7 Key Equations
| [latex]formal \; charge = # \; valence \; electrons \: (free \; atoms) - # \; lone \; pair \; electrons[/latex] |
| [latex]- \frac{1}{2} \: \# \; bonding \; electrons[/latex] |
| Bond energy for a diatomic molecule: [latex]XY(g) \rightarrow X(g) + Y(g) \; \; \; \; \; D_{X-Y} = \Delta H^{\circ}[/latex] |
| Enthalpy change: [latex]\Delta H = \Sigma D_{bonds \; broken} - \Sigma D_{bonds \; formed}[/latex] |
| Lattice energy for a solid MX: [latex]MX(s) \rightarrow M^{n+}(g) + X^{n-}(g) \; \; \; \; \; \Delta H_{lattice}[/latex] |
| Lattice energy for an ionic crystal: [latex]\Delta H_{lattice} = \frac {C (Z^+)(Z^-)}{R_{\circ}}[/latex] |