CHM 115 Exam 2 study guide
CHM 115 Exam 2 study guide CHM 11500 - 002
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This 2 page Study Guide was uploaded by Zack Bales on Thursday March 3, 2016. The Study Guide belongs to CHM 11500 - 002 at Purdue University taught by Chittaranjan Das,Suzanne C Doucette in Fall 2015. Since its upload, it has received 101 views. For similar materials see General Chemistry in Chemistry at Purdue University.
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Date Created: 03/03/16
CHM 115 Exam 2 Quantum Numbers o n – (1-7) o ℓ - (n-1) down to zero o m - (-ℓ to ℓ ) o m -s+1/2 NRG Orbitals o Filling orbitals Add-electrons to lowest NRG first 2 e per orbital with opposite spins Fill each with one e before filling with 2 Types of electrons o Outer – highest n o Valence – involved in bonds o Core – lower n levels Composition of Solutions o Ions are stabilized by solution o Non electrolytes retain structure when dissolved o Gases become less soluable as temp increases o Solids become more soluble as temp increases o Solute + solvent solution Spectroscopy o Molecules absorb light at different energies o Absorbance = εℓc Atomic Radii o Distance between atoms o Ionization Energy Energy needed to remove electron o Electron Affinity Change in energy accompanying additional electrons Larger EA = more energy Metallic o Main group – ionic oxides, basic o Main group nonmetals – covalent oxides, acidic o Amphoteric oxides – acid or base o Oxidation loses electron, reduction gain electrons Bonds o Cations are smaller than parent atoms o Anions are larger than parent atoms o Magnetic Properties Spinning electrons generate magnetic field Paramagnetic: one or more d orbital with unpaired electron, weak Diamagnetic: only one paired electron set not attracted by magnetic field o Chemical bond Ionic – metal + nonmetal Covalent – nonmetal + nonmetal Metallic – metal + metal Atoms are unpaired in ionic and metallic Enthalpy of Rxn ΔH o ΔH = sum ofΔHf products – sum of ΔHf reactants o ΔHoverall = ΔH1 + ΔH2 + ΔH3 + … o Lattice Energy -ΔHlat = - ΔH final - (ΔH1 + ΔH2 + …) o ΔHrxn = sum Bonds formed – sum bonds broken
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