CHEM 110 Lecture Notes - Lecture 13: Lewis Structure, Robert S. Mulliken, Covalent Bond
Wednesday, October 4, 2017
Bond Length & Covalent Radius
CHEM 110
-More accurate radius predictions of heavier elements, poorer predictions for the light
elements
-Periodic Trends in Bond E and Length
•up & —> Increasing bond E, decreasing bond length
-Bond Energies
•Bond Dissociation E: E required to break one mol of x-y bonds in a gaseous
species
-E is always needed to break a covalent bond
•Bond breakage = + enthalpy change
•Bond formation = - enthalpy change
-Using Bond Energies to Calculate Enthalpy of Reaction
•Use Hess’ Law
•Exothermic vs. endothermic
•Exothermic example: Endothermic:
-Question:
•You can make ____ from carbon dioxide if the condition is suitable
-ATP:
•Reaction inside us
•Particles were smaller in the
•Robert Mulliken (1896-1986)
•Other dude ****************************
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CHEM 110 Full Course Notes
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Document Summary
More accurate radius predictions of heavier elements, poorer predictions for the light elements. Periodic trends in bond e and length: up & > increasing bond e, decreasing bond length. Bond energies: bond dissociation e: e required to break one mol of x-y bonds in a gaseous species. E is always needed to break a covalent bond: bond breakage = + enthalpy change, bond formation = - enthalpy change. Using bond energies to calculate enthalpy of reaction: use hess" law, exothermic vs. endothermic, exothermic example: endothermic: Question: you can make ____ from carbon dioxide if the condition is suitable. Atp: reaction inside us, particles were smaller in the, robert mulliken (1896-1986, other dude **************************** Electronegativities trends: polar covalent bond, particles chargers. Polar vs. non-polar covalent bonds: polar: covalent bonds with unequal sharing of electrons, atoms between 0. 5-1. 9. Method 1: build from lewis symbols: 1. Draw lewis symbols of each atom: 2. Pair valance e to create a complete lewis structure: 3.
