activation energy

简明释义

激活能

英英释义

例句

1.The activation energy barrier must be overcome for the reaction to occur.

必须克服活化能障碍才能使反应发生。

2.Enzymes act as catalysts by reducing the activation energy of biochemical reactions.

酶通过降低生化反应的活化能来作为催化剂。

3.Increasing the temperature can lower the activation energy needed for the reaction.

提高温度可以降低反应所需的活化能。

4.The chemical reaction requires a certain amount of activation energy to proceed.

化学反应需要一定量的活化能才能进行。

5.In some cases, light can provide the necessary activation energy for a reaction.

在某些情况下，光可以提供反应所需的活化能。

作文

In the realm of chemistry, the concept of activation energy plays a pivotal role in understanding how reactions occur and how quickly they proceed. Activation energy refers to the minimum amount of energy required for a chemical reaction to take place. This energy barrier must be overcome for reactants to transform into products, and it is a crucial factor in determining the rate of a reaction. Without sufficient activation energy, the molecules involved in the reaction do not have enough energy to collide with each other effectively, preventing the reaction from occurring. To illustrate this concept, let us consider the process of combustion. When wood burns, it requires an initial input of energy, such as a match or a spark, to ignite. This initial energy input is the activation energy. Once the fire has started, the heat generated by the burning wood provides enough energy to maintain the combustion process. In this case, the activation energy is necessary to initiate the reaction, but once it begins, the ongoing reaction generates its own energy, allowing it to continue without additional input.The significance of activation energy extends beyond just chemical reactions; it also has implications in various fields, including biology and environmental science. For example, enzymes, which are biological catalysts, lower the activation energy required for biochemical reactions to occur. By doing so, they increase the rate of these reactions, which is essential for sustaining life. Without enzymes, many biological processes would occur too slowly to support life as we know it.Moreover, understanding activation energy can help scientists develop more efficient industrial processes. By finding ways to reduce the activation energy of certain reactions, chemists can create more effective catalysts, leading to faster production times and reduced energy consumption. This is particularly important in the context of sustainable development, where minimizing energy use and maximizing efficiency are key goals.In conclusion, the concept of activation energy is fundamental to our understanding of chemical reactions and their rates. It serves as a barrier that must be overcome for reactions to occur and is influenced by various factors, including temperature and the presence of catalysts. By studying activation energy, we gain insights into not only chemical processes but also biological functions and industrial applications. As we continue to explore the complexities of chemistry, the role of activation energy will undoubtedly remain a critical area of focus, shedding light on the intricate dance of molecules that underpins our world.

在化学领域，活化能的概念在理解反应如何发生以及反应进行速度方面起着关键作用。活化能是指化学反应发生所需的最小能量。这一能量障碍必须被克服，反应物才能转化为产物，并且它是决定反应速率的关键因素。如果没有足够的活化能，参与反应的分子就没有足够的能量有效地碰撞，从而阻止反应的发生。为了说明这一概念，让我们考虑燃烧过程。当木材燃烧时，它需要初始的能量输入，例如火柴或火花，以点燃。这一初始能量输入就是活化能。一旦火焰点燃，燃烧木材产生的热量提供了足够的能量来维持燃烧过程。在这种情况下，活化能是启动反应所必需的，但一旦反应开始，持续的反应就会产生自身的能量，使其能够在不需要额外输入的情况下继续进行。活化能的重要性不仅限于化学反应；它还在生物学和环境科学等多个领域具有重要意义。例如，酶是一种生物催化剂，它降低了生化反应所需的活化能。通过这样做，酶提高了这些反应的速率，这对维持生命至关重要。如果没有酶，许多生物过程将发生得太慢，无法支持我们所知的生命。此外，理解活化能可以帮助科学家开发更高效的工业过程。通过寻找减少某些反应的活化能的方法，化学家可以创造出更有效的催化剂，从而加快生产时间并减少能量消耗。这在可持续发展背景下尤为重要，因为最小化能量使用和最大化效率是关键目标。总之，活化能的概念是我们理解化学反应及其速率的基础。它作为一个必须克服的障碍，促使反应发生，并受到温度和催化剂存在等各种因素的影响。通过研究活化能，我们不仅获得了对化学过程的洞察，还了解了生物功能和工业应用。随着我们继续探索化学的复杂性，活化能的角色无疑将仍然是一个关键关注领域，揭示支撑我们世界的分子间复杂舞蹈。