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 for avoiding decompression sickness.

在潜水中，理解气体的分压对避免减压病至关重要。

2.The partial pressure of a gas is directly related to its concentration in a mixture.

气体的分压与其在混合物中的浓度直接相关。

3.The partial pressure of carbon dioxide increases during exercise, which stimulates breathing.

运动时二氧化碳的分压增加，这会刺激呼吸。

4.At high altitudes, the partial pressure of oxygen decreases, making it harder to breathe.

在高海拔地区，氧气的分压降低，使呼吸变得困难。

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

大气中氧气的分压大约占总大气压的21%。

作文

Understanding the concept of partial pressure is essential in the fields of chemistry and physics, particularly when studying gases and their behaviors. The term partial pressure refers to the pressure exerted by a single component of a gas mixture. To illustrate this, consider a balloon filled with a mixture of oxygen and nitrogen. Each gas contributes to the total pressure inside the balloon, but each gas also exerts its own partial pressure. The total pressure in the balloon is the sum of the partial pressures of both gases. This principle is described by Dalton's Law of Partial Pressures, which states that the total pressure of a gas mixture is equal to the sum of the partial pressures of its individual components.In practical applications, understanding partial pressure can be crucial for various scientific and industrial processes. For instance, in respiratory physiology, the partial pressure of oxygen in the lungs affects how oxygen is absorbed into the bloodstream. When we breathe in, the air pressure changes, and the partial pressure of oxygen increases, allowing it to diffuse into the blood. Similarly, the partial pressure of carbon dioxide in the blood determines how efficiently carbon dioxide is expelled from the body.Moreover, the concept of partial pressure extends beyond biology and into environmental science. In studying climate change, scientists examine the partial pressures of greenhouse gases in the atmosphere. Each gas, like carbon dioxide or methane, has its own partial pressure, which contributes to the overall effect on global warming. By monitoring these partial pressures, researchers can better understand the dynamics of climate change and develop strategies for mitigation.In the realm of chemistry, the partial pressure is also significant in reactions involving gases. For example, in chemical equilibrium, the partial pressures of reactants and products dictate the direction in which a reaction will proceed. Le Chatelier's Principle states that if a system at equilibrium is disturbed, it will shift in a direction that counteracts the disturbance. Therefore, manipulating the partial pressures of the involved gases can lead to desired outcomes in chemical synthesis.In conclusion, the concept of partial pressure is foundational in understanding the behavior of gases in various contexts, from biological systems to environmental science and chemical reactions. Mastering this concept allows scientists and students alike to grasp the intricate relationships between different gases and their contributions to pressure in mixtures. By recognizing the significance of partial pressure, we can apply this knowledge to real-world problems, enhancing our ability to innovate and find solutions in science and technology.

理解部分压力的概念在化学和物理领域中是至关重要的，特别是在研究气体及其行为时。术语部分压力指的是气体混合物中单个组分所施加的压力。为了说明这一点，考虑一个充满氧气和氮气混合物的气球。每种气体都对气球内部的总压力产生贡献，但每种气体也施加自己的部分压力。气球中的总压力是两种气体的部分压力之和。这个原理被称为道尔顿部分压力定律，它指出气体混合物的总压力等于其各个组分的部分压力之和。在实际应用中，理解部分压力对各种科学和工业过程至关重要。例如，在呼吸生理学中，肺部的氧气部分压力影响着氧气被吸收到血液中的效率。当我们吸气时，空气压力发生变化，氧气的部分压力增加，从而使其扩散到血液中。同样，血液中二氧化碳的部分压力决定了二氧化碳从身体中排出的效率。此外，部分压力的概念超越了生物学，延伸到环境科学。在研究气候变化时，科学家们考察大气中温室气体的部分压力。每种气体，如二氧化碳或甲烷，都有其自己的部分压力，这对全球变暖的整体影响产生贡献。通过监测这些部分压力，研究人员可以更好地理解气候变化的动态，并制定减缓的策略。在化学领域，部分压力在涉及气体的反应中也具有重要意义。例如，在化学平衡中，反应物和产品的部分压力决定了反应的进行方向。勒夏特列原理指出，如果处于平衡状态的系统受到干扰，它将朝着抵消干扰的方向移动。因此，操纵参与气体的部分压力可以导致化学合成中期望的结果。总之，部分压力的概念在理解气体在各种背景下的行为中是基础性的，从生物系统到环境科学和化学反应。掌握这一概念使科学家和学生能够理解不同气体之间的复杂关系及其对混合物压力的贡献。通过认识部分压力的重要性，我们可以将这一知识应用于现实问题，增强我们在科学和技术创新与解决方案方面的能力。