partial pressure

简明释义

分压力

英英释义

例句

1.In scuba diving, understanding the partial pressure of gases is crucial to avoid decompression sickness.

在潜水中，理解气体的分压对于避免减压病至关重要。

2.The partial pressure of carbon dioxide increases in the blood during physical exertion.

在身体活动期间，血液中二氧化碳的分压会增加。

3.Gas exchange in the lungs occurs due to differences in partial pressure between the alveoli and blood.

肺部的气体交换是由于肺泡和血液之间的分压差异。

4.The partial pressure of oxygen in the atmosphere is approximately 21% of the total atmospheric pressure.

大气中氧气的分压约占总大气压的21%。

5.The partial pressure of water vapor affects weather patterns and humidity levels.

水蒸气的分压影响天气模式和湿度水平。

作文

Understanding the concept of partial pressure is essential in the study of gases and their behaviors. In chemistry and physics, partial pressure refers to the pressure that a single gas in a mixture would exert if it occupied the entire volume by itself at the same temperature. This concept is crucial for various applications, from breathing in oxygen to industrial processes involving gas mixtures.To illustrate the importance of partial pressure, let us consider the atmosphere. The air we breathe is a mixture of different gases, primarily nitrogen, oxygen, carbon dioxide, and trace amounts of other gases. Each of these gases contributes to the total atmospheric pressure, but they do so individually based on their own partial pressure. For example, at sea level, the total atmospheric pressure is approximately 101.3 kPa. The partial pressure of oxygen in this mixture is about 21% of the total pressure, which is roughly 21.2 kPa. This means that when we inhale, the oxygen molecules exert a partial pressure that allows them to diffuse into our bloodstream effectively.The relationship between partial pressure and gas solubility is another critical aspect. According to Henry's Law, the amount of gas that dissolves in a liquid at a given temperature is directly proportional to the partial pressure of that gas above the liquid. This principle is particularly significant in fields such as medicine and environmental science. For instance, in scuba diving, divers must be cautious about the partial pressure of nitrogen in the air they breathe because increased pressure underwater can lead to nitrogen narcosis or decompression sickness if they ascend too quickly.Moreover, understanding partial pressure is vital in the context of respiratory physiology. The exchange of gases in the lungs relies on the differences in partial pressure between the alveoli and the blood. Oxygen diffuses from the alveoli into the blood where its partial pressure is lower, while carbon dioxide moves in the opposite direction due to its higher partial pressure in the blood. This process is fundamental to how our bodies obtain oxygen and eliminate carbon dioxide, ensuring efficient respiration.In industrial applications, the concept of partial pressure is also utilized. For example, in chemical reactors, controlling the partial pressure of reactants can significantly influence the rate of reactions and the yield of products. Engineers often design systems to maintain optimal partial pressures to maximize efficiency and minimize waste.In conclusion, the concept of partial pressure plays a pivotal role in various scientific and practical fields. From understanding how gases behave in the atmosphere to their physiological roles in our bodies, and even their applications in industry, the significance of partial pressure cannot be overstated. A solid grasp of this concept not only enhances our comprehension of physical sciences but also informs practical decision-making in health, safety, and engineering practices. Thus, mastering the idea of partial pressure is invaluable for anyone engaged in scientific studies or professions that involve gas behavior and interactions.

理解部分压力的概念在气体及其行为的研究中至关重要。在化学和物理学中，部分压力是指混合气体中的单一气体在相同温度下占据整个体积时所施加的压力。这个概念对各种应用至关重要，从呼吸氧气到涉及气体混合物的工业过程。为了说明部分压力的重要性，让我们考虑一下大气层。我们呼吸的空气是由不同气体的混合物组成，主要是氮气、氧气、二氧化碳和微量其他气体。这些气体各自对总大气压力做出贡献，但它们是基于自身的部分压力单独进行的。例如，在海平面，总大气压力大约为101.3 kPa。氧气在这种混合物中的部分压力约为21%的总压力，大约为21.2 kPa。这意味着当我们吸气时，氧气分子施加的部分压力使其能够有效地扩散到我们的血液中。部分压力与气体溶解度之间的关系是另一个关键方面。根据亨利定律，在给定温度下，溶解在液体中的气体量与该气体在液体上方的部分压力成正比。这个原理在医学和环境科学等领域尤为重要。例如，在潜水时，潜水员必须小心他们所呼吸空气中氮气的部分压力，因为水下的高压会导致氮麻痹或减压病，尤其是如果他们升得太快。此外，理解部分压力在呼吸生理学中也是至关重要的。肺部的气体交换依赖于肺泡与血液之间的部分压力差异。氧气从肺泡扩散到血液中，而那里氧气的部分压力较低，而二氧化碳则由于其在血液中较高的部分压力向相反方向移动。这个过程是我们身体如何获取氧气和排除二氧化碳的基础，确保有效的呼吸。在工业应用中，部分压力的概念也被利用。例如，在化学反应器中，控制反应物的部分压力可以显著影响反应速率和产品产量。工程师通常设计系统以维持最佳的部分压力，以最大化效率并最小化浪费。总之，部分压力的概念在各种科学和实际领域中发挥着关键作用。从理解气体在大气中的行为到它们在我们身体中的生理角色，以及它们在工业中的应用，部分压力的重要性不容小觑。扎实掌握这一概念不仅增强了我们对物理科学的理解，还为健康、安全和工程实践中的实际决策提供了信息。因此，掌握部分压力的概念对于任何从事科学研究或涉及气体行为和相互作用的职业的人来说都是无价的。