chemical reaction

简明释义

化学反应

英英释义

例句

1.Baking soda and vinegar react to produce carbon dioxide in a fun chemical reaction 化学反应 experiment.

小苏打和醋反应产生二氧化碳，这是一个有趣的化学反应实验。

2.In photosynthesis, plants convert sunlight into energy through a series of chemical reactions 化学反应.

在光合作用中，植物通过一系列化学反应将阳光转化为能量。

3.The rusting of iron is an example of a slow chemical reaction 化学反应 with oxygen in the air.

铁锈的形成是与空气中的氧气发生缓慢化学反应的一个例子。

4.A fire occurs when a certain type of chemical reaction 化学反应 takes place between oxygen and fuel.

当氧气和燃料之间发生某种类型的化学反应时，就会发生火灾。

5.The process of digestion involves many complex chemical reactions 化学反应 in the body.

消化过程涉及体内许多复杂的化学反应。

作文

A chemical reaction refers to the process where substances, known as reactants, undergo a transformation to form new substances, called products. This transformation involves the breaking and forming of bonds between atoms, resulting in a change in the chemical properties of the original substances. Understanding chemical reactions is fundamental to the field of chemistry, as it explains how matter interacts and changes at the molecular level.There are several types of chemical reactions, each characterized by different processes and outcomes. For instance, synthesis reactions occur when two or more reactants combine to form a single product. An example of this is the formation of water when hydrogen gas reacts with oxygen gas. On the other hand, decomposition reactions involve a single compound breaking down into two or more simpler products. A common example is the electrolysis of water, which separates water into hydrogen and oxygen gases.Another important category is combustion reactions, which typically involve a hydrocarbon reacting with oxygen to produce carbon dioxide and water, releasing energy in the form of heat and light. This type of chemical reaction is crucial for various applications, including energy production in engines and power plants.Moreover, chemical reactions can be classified as exothermic or endothermic based on the energy changes that occur during the process. Exothermic reactions release energy, often in the form of heat, making the surroundings warmer. An example is the combustion of fuels, where energy is released. In contrast, endothermic reactions absorb energy from their surroundings, leading to a decrease in temperature. Photosynthesis in plants is a prime example, as it requires sunlight to convert carbon dioxide and water into glucose and oxygen.Understanding the factors influencing chemical reactions is also essential. Factors such as temperature, concentration, surface area, and the presence of catalysts can significantly affect the rate and outcome of a reaction. For instance, increasing the temperature generally speeds up a reaction because the particles move faster and collide more frequently. Similarly, using a catalyst can lower the activation energy required for a reaction, allowing it to proceed more quickly without being consumed in the process.The study of chemical reactions has profound implications in various fields, including medicine, environmental science, and engineering. In medicine, understanding how drugs interact with biological systems relies heavily on principles of chemical reactions. In environmental science, studying the reactions that occur in nature helps us understand issues like pollution and climate change.In conclusion, chemical reactions are a central concept in chemistry that describes how substances interact and transform into new products. By exploring the different types of chemical reactions, their classifications, and the factors affecting them, we gain valuable insights into the natural world and its processes. This knowledge not only enriches our understanding of chemistry but also enhances our ability to innovate and solve real-world problems.

化学反应是指物质（称为反应物）经历转变以形成新物质（称为产品）的过程。这一转变涉及原子之间的键的断裂和形成，导致原始物质的化学性质发生变化。理解化学反应是化学领域的基础，因为它解释了物质在分子层面如何相互作用和变化。化学反应有几种类型，每种类型都有不同的过程和结果。例如，合成反应发生在两个或多个反应物结合形成单一产品时。一个例子是氢气与氧气反应生成水。另一方面，分解反应涉及单一化合物分解成两个或更多简单产品。一个常见的例子是水的电解，它将水分解为氢气和氧气。另一个重要的类别是燃烧反应，通常涉及烃与氧气反应生成二氧化碳和水，同时释放热量和光能。这种类型的化学反应对各种应用至关重要，包括发动机和发电厂中的能源生产。此外，化学反应可以根据过程中发生的能量变化分为放热反应和吸热反应。放热反应释放能量，通常以热量的形式，使周围环境变得更温暖。例如，燃料的燃烧就是一种释放能量的反应。相反，吸热反应从周围环境中吸收能量，导致温度下降。植物中的光合作用就是一个典型例子，因为它需要阳光将二氧化碳和水转化为葡萄糖和氧气。了解影响化学反应的因素也至关重要。温度、浓度、表面积和催化剂的存在等因素都能显著影响反应的速率和结果。例如，提高温度通常会加速反应，因为粒子运动更快并且更频繁地碰撞。同样，使用催化剂可以降低反应所需的活化能，从而使反应更快速地进行，而催化剂本身不会被消耗。对化学反应的研究在医学、环境科学和工程等多个领域具有深远的影响。在医学中，理解药物如何与生物系统相互作用在很大程度上依赖于化学反应的原理。在环境科学中，研究自然界中发生的反应帮助我们理解污染和气候变化等问题。总之，化学反应是化学中的一个核心概念，描述了物质如何相互作用并转变为新产品。通过探索不同类型的化学反应、它们的分类以及影响它们的因素，我们获得了对自然世界及其过程的宝贵见解。这些知识不仅丰富了我们对化学的理解，还增强了我们创新和解决现实问题的能力。