cohesive energy

简明释义

内聚能

英英释义

例句

1.The cohesive energy of water molecules contributes to its unique properties, such as surface tension.

水分子的 凝聚能 使其具有独特的性质，如表面张力。

2.The concept of cohesive energy is crucial in understanding the stability of molecular structures.

理解分子结构的稳定性时，凝聚能的概念至关重要。

3.In materials science, high cohesive energy often indicates stronger bonds between atoms.

在材料科学中，高 凝聚能 通常表明原子之间的结合力更强。

4.Researchers measured the cohesive energy of different materials to determine their suitability for construction.

研究人员测量了不同材料的 凝聚能 以确定其在建筑中的适用性。

5.Understanding the cohesive energy of a polymer can help predict its behavior under stress.

理解聚合物的 凝聚能 可以帮助预测其在应力下的表现。

作文

The concept of cohesive energy is fundamental in understanding the interactions between molecules and atoms in various materials. In simple terms, cohesive energy refers to the energy required to separate molecules from each other within a substance. It is a measure of the strength of the intermolecular forces that hold the molecules together. This energy plays a crucial role in determining the physical properties of materials, such as their boiling and melting points, viscosity, and surface tension.For instance, in liquids, cohesive energy is responsible for phenomena like surface tension, which allows small objects to float on water despite being denser than it. The molecules at the surface experience a net inward force due to the stronger attraction they have with the molecules below them compared to those above. This results in a 'skin' effect on the surface of the liquid, which is a direct consequence of high cohesive energy.In solids, cohesive energy dictates the structural integrity of materials. For example, metals have high cohesive energy due to strong metallic bonds, which contribute to their durability and ability to withstand stress without deforming. Conversely, materials with lower cohesive energy, such as certain polymers, may exhibit more flexibility but less strength.Moreover, cohesive energy is not only significant in a scientific context but also has practical applications in industries ranging from construction to pharmaceuticals. In the construction industry, understanding the cohesive energy of various building materials helps engineers select the right components for structures that need to endure specific loads and environmental conditions. In pharmaceuticals, the cohesive energy of drug formulations affects how well they dissolve and are absorbed in the body, which is vital for the efficacy of medications.In conclusion, cohesive energy is a key concept that influences many aspects of material science and engineering. Its implications extend beyond theoretical discussions, impacting real-world applications and innovations. By studying cohesive energy, scientists and engineers can develop better materials and processes that enhance our everyday lives, making it an essential area of research in both academia and industry.

“凝聚能”这一概念对于理解各种材料中分子和原子之间的相互作用至关重要。简单来说，“凝聚能”是指将物质中的分子彼此分离所需的能量。它是一种测量分子间相互作用力强度的指标，这种相互作用力将分子结合在一起。这种能量在决定材料的物理属性方面发挥着关键作用，例如其沸点和熔点、粘度以及表面张力。例如，在液体中，“凝聚能”负责诸如表面张力等现象，这使得小物体能够漂浮在水面上，尽管它们的密度比水大。表面上的分子由于与下面的分子相比，与上面的分子的吸引力更强，因此会经历向内的净力。这导致液体表面形成一种“皮肤”效应，这是高“凝聚能”的直接结果。在固体中，“凝聚能”决定了材料的结构完整性。例如，金属由于具有较强的金属键而具有高“凝聚能”，这有助于其耐用性和承受压力而不变形的能力。相反，某些聚合物等“凝聚能”较低的材料可能表现出更大的灵活性，但强度较低。此外，“凝聚能”不仅在科学背景下重要，而且在建筑、制药等行业中也具有实际应用。在建筑行业，了解各种建筑材料的“凝聚能”帮助工程师选择适合特定载荷和环境条件的结构组件。在制药行业，药物配方的“凝聚能”影响其溶解和在体内吸收的效果，这对于药物的有效性至关重要。总之，“凝聚能”是影响材料科学和工程许多方面的关键概念。它的影响超越了理论讨论，影响着现实世界的应用和创新。通过研究“凝聚能”，科学家和工程师可以开发出更好的材料和工艺，从而提升我们的日常生活，使其成为学术界和工业界的一个重要研究领域。