partial pressure

简明释义

分压

英英释义

例句

1.When scuba diving, it's important to monitor the partial pressure of nitrogen to avoid decompression sickness.

在潜水时，监测氮气的分压是很重要的，以避免减压病。

2.The partial pressure of water vapor affects weather patterns and precipitation.

水蒸气的分压影响天气模式和降水情况。

3.In a gas mixture, each gas contributes to the total pressure according to its partial pressure.

在气体混合物中，每种气体根据其分压对总压力做出贡献。

4.The partial pressure of oxygen in the atmosphere is about 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 carbon dioxide increases during exercise, prompting the body to breathe more rapidly.

运动期间，二氧化碳的分压增加，促使身体更快地呼吸。

作文

Understanding the concept of partial pressure is crucial in the field of chemistry and physics, particularly when studying gases and their behaviors. The term partial pressure refers to the pressure that a single gas in a mixture would exert if it occupied the entire volume alone at the same temperature. This concept is fundamental to Dalton's Law of Partial Pressures, which states that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each individual gas in the mixture. To illustrate this idea, consider a container filled with three different gases: oxygen (O2), nitrogen (N2), and carbon dioxide (CO2). Each gas contributes to the total pressure within the container, but they do so independently. For example, if the partial pressure of oxygen is 20 mmHg, the partial pressure of nitrogen is 80 mmHg, and the partial pressure of carbon dioxide is 1 mmHg, then the total pressure inside the container would be the sum of these pressures, resulting in 101 mmHg. The importance of partial pressure extends beyond theoretical applications; it plays a significant role in various real-world scenarios. One such scenario is in the human respiratory system. When we inhale, the air we breathe consists of multiple gases, primarily nitrogen and oxygen. The partial pressure of oxygen in the lungs is critical for determining how much oxygen will dissolve in the blood. According to Henry's Law, the amount of gas that dissolves in a liquid is proportional to the partial pressure of that gas above the liquid. Therefore, higher partial pressures of oxygen lead to greater amounts of oxygen being absorbed into the bloodstream, which is essential for cellular respiration. Another application of partial pressure can be found in scuba diving. Divers must understand how partial pressure affects the solubility of gases in their bodies. As a diver descends, the pressure increases, which in turn increases the partial pressure of the gases in the surrounding water. This increased partial pressure can lead to a higher concentration of dissolved gases, such as nitrogen, in the diver's body. If a diver ascends too quickly after spending time at depths where the partial pressure of nitrogen was high, it can result in decompression sickness, commonly known as 'the bends.' This condition occurs because the rapid decrease in pressure allows nitrogen to come out of solution too quickly, forming bubbles in the bloodstream. In conclusion, the concept of partial pressure is not only a fundamental principle in gas laws but also has practical implications in various fields, including medicine and environmental science. Understanding how partial pressure works allows scientists and professionals to predict the behavior of gases under different conditions, ultimately leading to advancements in technology and safety measures in activities such as diving and medical treatments. By grasping the significance of partial pressure, we gain deeper insights into the interactions of gases in our world, enhancing our ability to navigate and manipulate these interactions effectively.

理解部分压力的概念在化学和物理学领域至关重要，特别是在研究气体及其行为时。术语部分压力指的是在相同温度下，如果单一气体占据整个容积时所施加的压力。这个概念是道尔顿部分压力定律的基础，该定律指出，气体混合物所施加的总压力等于混合物中每种气体的部分压力之和。为了说明这一点，考虑一个充满三种不同气体的容器：氧气（O2）、氮气（N2）和二氧化碳（CO2）。每种气体都对容器内的总压力作出贡献，但它们是独立作用的。例如，如果氧气的部分压力为20 mmHg，氮气的部分压力为80 mmHg，而二氧化碳的部分压力为1 mmHg，那么容器内的总压力将是这些压力的总和，结果为101 mmHg。部分压力的重要性超出了理论应用；它在各种现实场景中发挥着重要作用。其中一个场景是在人体呼吸系统中。当我们吸气时，我们呼吸的空气由多种气体组成，主要是氮气和氧气。肺部的氧气部分压力对于决定有多少氧气会溶解在血液中至关重要。根据亨利定律，气体在液体中溶解的量与该气体在液体上方的部分压力成正比。因此，氧气的部分压力越高，进入血液中的氧气量就越大，这对于细胞呼吸至关重要。另一个部分压力的应用可以在潜水中找到。潜水员必须了解部分压力如何影响气体在他们体内的溶解度。当潜水员下潜时，压力增加，从而增加周围水中气体的部分压力。这种增加的部分压力可能导致如氮气等溶解气体的浓度在潜水员体内升高。如果潜水员在深度停留后过快上升，可能会导致减压病，通常称为“弯曲”。这种情况发生是因为压力的快速下降使得氮气从溶液中迅速逸出，形成血液中的气泡。总之，部分压力的概念不仅是气体法则中的基本原理，而且在医学和环境科学等多个领域具有实际意义。理解部分压力如何运作使科学家和专业人员能够预测气体在不同条件下的行为，从而推动技术和安全措施的发展，例如潜水和医疗治疗。通过掌握部分压力的重要性，我们可以更深入地了解气体在我们世界中的相互作用，增强我们有效导航和操控这些相互作用的能力。