[PDF] Polarity and Intermolecular Forces

Chapter 11 Intermolecular Forces

Dipole–Dipole Interactions or Dispersion Forces • If two molecules are of comparable size and shape, dipole–dipole interactions will likely be the dominating force • If one molecule is much larger than another, dispersion forces will likely determine its physical properties

Introduction to Intermolecular Forces

Dipole-Dipole Interactions: • Dipole-dipole forces exist between molecules that are polar-those that have a permanent dipole moment due to uneven sharing of electrons • This uneven sharing gives one side of the molecule a partial positive charge (δ+) and the other side a partially negative charge (δ-)

Polarity and Intermolecular Forces

Vocabulary: dipole, dipole-dipole force, dipole-induced dipole force, electronegativity, intermolecular force, ionic bond, London dispersion force, molecule, nonpolar, nonpolar covalent bond, partial charges, polar, polar covalent bond, valence electron Prior Knowledge Questions (Do these BEFORE using the Gizmo ) 1

Hour 1: Dipoles & Magnetic Fields Hour 2: Expt 7: Dipoles in

Force on Magnetic Dipole UDipole = -µB⋅ GG To determine force, we need to know energy: FDipole = -∇=UDipole ∇(µ⋅B) GGGGG Force tells how the energy changes with position: (after math) =⋅(µB∇) GGG Dipoles only feel force in non-uniform field

Dipoles and Intermolecular Forces

Jan 16, 2018 · Ion-Dipole Interactions are an important factor in the solubility of ionic compounds Ion-dipole interactions can be considered as another important “inter-molecular force” or “chemical bond” although they doesn’t fit cleanly into either definition

Electric Dipole - TAMUC

dipole is put in an electric field? (com = center of mass) zNet force, from uniform E, is zero zBut force on charged ends produces a net torque about its center of mass

Chapter 11 Homework - Valdosta State University

CH3SH – Dipole-dipole interaction Hydrogen bonding is the strongest intermolecular force, so CH3OH will have the higher boiling point d) NH2NH2 – Hydrogen bonding CH3CH3 – London-dispersion force Hydrogen bonding is the strongest intermolecular force, so NH2NH2 will have the higher boiling point 11 24

OPTICAL DIPOLE TRAPS FOR NEUTRAL ATOMS

Historically, the optical dipole force, acting as con n-ing mechanism in a dipole trap, was rst considered by Askar’yan (1962) in connection with plasmas as well as neutral atoms The possibility of trapping atoms with this force was considered by Letokhov (1968) who sug-gested that atoms might be one-dimensionally con ned

Electric dipole moments and conformations of isolated peptides

I Rappels et compléments 1) Dipôles actifs

CHAPITRE 12 CARACTERISTIQUE D'UN DIPOLE ACTIF 4 La f é m E est l’ordonnée à l’origine de la caractéristique intensité–tension, soit ici : E = 4,3 V L’unité S I de force électromotrice est le volt (V) On remarque que si l’on fait I = 0, on obtient UPN = E, la f é m d’une pile