“van der Waals' force”的概念、定义、习题解题方法及翻译-物理辞典

单词	van der Waals' force
释义	van der Waals' force An attractive force between atoms or molecules, named after J. D. van der Waals (1837–1923). The force accounts for the term a/V² in the van der Waals equation (see equation of state). These forces are much weaker than those arising from valence bonds and are inversely proportional to the seventh power of the distance between the atoms or molecules. They are the forces responsible for nonideal behaviour of gases and for the lattice energy of molecular crystals. There are three factors causing such forces: (1) dipole-dipole interaction, i.e. electrostatic attractions between two molecules with permanent dipole moments; (2) dipole-induced dipole interactions, in which the dipole of one molecule polarizes a neighbouring molecule; (3) dispersion forces arising because of small instantaneous dipoles in atoms.
随便看	cryostat cryotron crystal crystal counter crystal defect crystal habit crystal lattice crystal microphone crystal oscillator crystal pick-up crystal structure crystal system crystallography crystalloids CT scanner cubic crystal cubic equation cubic expansivity curie Curie point Curie's law Curie, Marie curium curl current

物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。