activation energy

简明释义

活化能

英英释义

例句

1.In enzyme-catalyzed reactions, the activation energy 活化能 is significantly reduced.

在酶催化的反应中，活化能显著降低。

2.The reaction rate increases when the activation energy 活化能 is lowered.

当活化能降低时，反应速率会增加。

3.The activation energy 活化能 can be determined experimentally by measuring the reaction rate at different temperatures.

通过测量不同温度下的反应速率，可以实验性地确定活化能。

4.Temperature affects the activation energy 活化能 required for chemical reactions.

温度影响化学反应所需的活化能。

5.Catalysts work by providing an alternative pathway with a lower activation energy 活化能 for the reaction.

催化剂通过提供一个具有较低活化能的替代反应路径来工作。

作文

In the realm of chemistry, the concept of activation energy plays a pivotal role in understanding how reactions occur. 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 that influences the rate of reactions. When molecules collide, they must possess sufficient energy to break existing bonds and form new ones; this is where activation energy comes into play.To illustrate this concept, consider the process of burning wood. When you strike a match, the friction generates heat, which provides the necessary activation energy to ignite the wood. Without this initial input of energy, the wood would not catch fire, even though it is capable of burning. This example highlights how activation energy is essential in initiating reactions that might otherwise be dormant.Moreover, activation energy is not a fixed value; it can vary significantly between different reactions. For instance, some reactions require only a small amount of energy to proceed, while others demand a much higher threshold. This variance is influenced by various factors, including the nature of the reactants, the presence of catalysts, and environmental conditions such as temperature and pressure. Catalysts, in particular, are fascinating because they lower the activation energy, allowing reactions to occur more readily and at lower temperatures. A common example is the use of enzymes in biological systems. Enzymes act as catalysts that facilitate biochemical reactions by reducing the activation energy, thereby increasing the reaction rate in living organisms.The importance of activation energy extends beyond the laboratory; it is also a critical factor in industrial applications. In manufacturing processes, controlling the activation energy can lead to more efficient production methods. For example, in the production of pharmaceuticals, understanding the activation energy involved in drug synthesis can optimize yields and reduce costs. By carefully selecting conditions that minimize activation energy, chemists can streamline processes and improve product quality.In addition to its practical implications, the concept of activation energy also serves as a metaphor in our daily lives. Just as chemical reactions require energy to initiate change, individuals often face challenges that necessitate a certain amount of motivation or effort to overcome. For instance, pursuing a new career or starting a fitness regimen can be daunting, but recognizing the need for an initial push—much like activation energy in a reaction—can help individuals take the first step toward achieving their goals.In conclusion, the concept of activation energy is fundamental to our understanding of chemical reactions, with implications that reach far beyond the laboratory. From catalysis in biological systems to industrial applications and personal growth, activation energy serves as a reminder that change often requires an initial investment of energy. By appreciating the role of activation energy, we can better understand the mechanisms that drive both chemical processes and our own life journeys.

在化学领域，活化能的概念在理解反应如何发生中起着关键作用。活化能是指化学反应发生所需的最小能量。这一能量屏障必须被克服，反应物才能转变为产物，它是影响反应速率的关键因素。当分子碰撞时，它们必须具备足够的能量来打破现有的键并形成新的键；这就是活化能发挥作用的地方。为了说明这一概念，可以考虑燃烧木材的过程。当你划燃火柴时，摩擦产生的热量提供了点燃木材所需的初始活化能。如果没有这种能量输入，木材将无法着火，即使它能够燃烧。这个例子突显了活化能在启动可能处于休眠状态的反应中的重要性。此外，活化能并不是一个固定值；它在不同反应之间可以显著变化。例如，有些反应只需要少量能量就能进行，而其他反应则需要更高的阈值。这种差异受到多种因素的影响，包括反应物的性质、催化剂的存在以及温度和压力等环境条件。催化剂尤其引人注目，因为它们降低了活化能，使反应能够更容易地发生并在较低温度下进行。一个常见的例子是生物系统中酶的使用。酶作为催化剂，通过降低活化能来促进生化反应，从而提高生物体内的反应速率。活化能的重要性不仅限于实验室；它也是工业应用中的一个关键因素。在制造过程中，控制活化能可以导致更高效的生产方法。例如，在制药过程中，了解药物合成中涉及的活化能可以优化产量并降低成本。通过仔细选择减少活化能的条件，化学家可以简化过程并提高产品质量。除了实际意义外，活化能的概念在我们日常生活中也可以作为一种隐喻。正如化学反应需要能量来启动变化，个人往往面临挑战，需要一定的动力或努力来克服。例如，追求新职业或开始健身计划可能令人畏惧，但认识到需要初步推动——就像反应中的活化能一样——可以帮助个人迈出实现目标的第一步。总之，活化能的概念是我们理解化学反应的基础，其影响远远超出了实验室。从生物系统中的催化到工业应用和个人成长，活化能提醒我们，变化往往需要初始能量的投入。通过欣赏活化能的作用，我们可以更好地理解驱动化学过程和我们自身生活旅程的机制。