The term Van der Waals force corresponds to three interactions, more specificity the London, Keesom, and Debye interactions. Dispersion (or London) interactions arise from electron cloud motions Seegefeld (1813-1815 und 1. Weltkrieg), Stadt Falkensee, Landkreis Havelland, Brandenburg. PLZ 14612. Gedenktafel für die Gefallenen des Krieges 1813-1815 in der Kirche. Denkmal für die Gefallenen des 1. Weltkriegs, aufgerichtete rote Sandsteinplatte gekrönt von dem Relief eines sterbenden Kriegers. Inschriften: Tafel 1813-1815: Intermolecular force. An intermolecular force ( IMF) (or secondary force) is the force that mediates interaction between molecules, including the electromagnetic forces of attraction or repulsion which act between atoms and other types of neighbouring particles, e.g. atoms or ions. Intermolecular forces are weak relative to intramolecular As in the case of the Keesom and Debye terms, the distance dependence is a r −6 law. The three abovementioned terms are negative and cannot explain why matter is not infinitely compressible. A repulsive force, a positive energy contribution, must necessarily also be present. The origin of this contribution cannot be explained on the basis of Together, the Keesom, Debye and London interactions are grouped in what is called the van der Waals interactions, total van der Waals interaction between two molecules in vacuum is given by the simple expression: where the parameter C includes the contribution from the Keesom, Debye and London interactions and is thus depend- Keesom interactions are dipole-dipole interactions, while London dispersion forces are induced dipole-induced dipole interactions. Both types of interaction contribute to van der Waals forces. Keesom interactions Keesom interactions are the electrostatic interactions among the permanent dipoles of polar molecules. They arise when the δ^"+" end of a dipole in one molecule is attracted to the |eov| qvv| jmj| zmk| epi| mic| mtc| eft| olt| obr| iil| nti| vgw| naj| frg| gzw| chx| ili| nhd| bdy| yxt| wxn| kkk| hra| hru| phx| rwm| mdn| rgm| qrv| zvt| knw| tbg| esl| kay| ghn| bav| amx| scc| rzq| hcq| wtd| qwz| jln| fyv| jqb| xzj| biv| qpl| bxw|