Such interactions between uncharged molecules are called van der Waals forces.
这种不带电分子的相互运动被叫做范德华力(Van Der Waals Forces)。
单词 | Van der Waals force |
释义 |
Van der Waals force
原声例句
双语版 TED-Ed 演讲精选 Such interactions between uncharged molecules are called van der Waals forces. 这种不带电分子的相互运动被叫做范德华力(Van Der Waals Forces)。 科学60秒 听力 2014年8月合集 To adhere, the setae rely on small electromagnetic attractions between molecules called van der Waals forces. 为了具有粘附性,刚毛依靠的是分子间被称为范德华力的力产生的微弱电磁吸引力。 双语版 TED-Ed 演讲精选 Once the viscoelastic adhesive fills these microscopic crevices, it is close enough to form Van der Waals forces. 一旦具有粘弹性的粘着剂充满了这些微小的裂缝,距离近到足够产生范德华力。 经济学人(汇总) The molecules are held there by electrostatic connections called Van der Waals forces that link them with the molecules of the pertinent surface. 分子通过一种被称为分子间作用力的静电连接与相关表面上的分子相连接而固定在那里的。 Crash Course 综合篇 The sheets are only held to other sheets with really weak van der Waals forces. 这些床单仅通过非常弱的范德华力与其他床单保持在一起。 双语版 TED-Ed 演讲精选 These weak bonds, called Van der Waals forces, can occur between any two materials, but only if they're extremely close together, closer than the naked eye can see. 这些弱的纽带名为范德华力,发生于任意两种材料之间,但只在两者极其接近时起作用,比肉眼可见还要更近。 SciSHow 快问快答小科普 The molecules bind because of Van der Waals forces, the weak attractive force between uncharged molecules. 分子结合是因为范德华力, 即不带电分子之间的弱吸引力。 SciSHow 快问快答小科普 And when glitter is just sitting on a surface, those Van der Waals' forces are also creating very weak static friction. 当闪光只是停留在一个表面上时,那些范德瓦尔斯力也会产生非常微弱的静摩擦。 TED-Ed(视频版) Dust grains 100 times smaller than the width of a human hair stick to each other through what’s called the van der Waals force. 比人类头发宽度小 100 倍的尘埃颗粒通过所谓的范德华力相互粘附。 TED-Ed(视频版) These weak bonds, called Van der Waals forces, can occur between any two materials, but only if they’re extremely close together, closer than the naked eye can see. 这些称为范德瓦尔斯力的弱键可以发生在任何两种材料之间,但前提是它们非常靠近,比肉眼所能看到的还要近。 SciSHow 快问快答小科普 So when a molecule passes through the tiny pores in the activated charcoal, those very weak charges make it cling to the carbon thanks to Van der Waals forces. 因此,当一个分子通过活性炭中的小孔时,由于范德华力, 那些非常弱的电荷使其附着在碳上。
中文百科
范德华力![]() 范德华力(van der Waals' force)在化学中指分子之间非定向的、无饱和性的、较弱的相互作用力,根据荷兰物理学家约翰内斯·范德瓦耳斯命名。范德华力是一种电性引力,但它比化学键或氢键弱得多,通常其能量小于5kJ/mol。范德华力的大小和分子的大小成正比。 范德华力的主要来源有三种机制: 范德华力的大小会影响物质尤其是分子晶体的熔点和沸点,通常分子的分子量越大,范德华力越大。水(氧化氢)比硫化氢的相对分子质量小,因此范德华力比后者弱,但由于水分子间存在更强的氢键,熔沸点反而更高。壁虎能够在墙及各种表面上行走,便是因为脚上极细致的匙突(spatulae)和接触面产生的范德华力所致。
英语百科
Van der Waals force 范德华力![]() ![]() In physical chemistry, the van der Waals forces (or van der Waals' interaction), named after Dutch scientist Johannes Diderik van der Waals, are the residual attractive or repulsive forces between molecules or atomic groups that do not arise from a covalent bond, or electrostatic interaction of ions or of ionic groups with one another or with neutral molecules. The resulting van der Waals forces can be attractive or repulsive. |
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