law of conservation of mass

简明释义

质量守恒定律

英英释义

例句

1.The experiment demonstrated the law of conservation of mass (质量守恒定律) when mixing vinegar and baking soda, where the total mass remained constant.

该实验通过醋和小苏打的混合演示了质量守恒定律（law of conservation of mass），其中总质量保持不变。

2.Understanding the law of conservation of mass (质量守恒定律) is crucial for balancing chemical equations.

理解质量守恒定律（law of conservation of mass）对于平衡化学方程式至关重要。

3.When burning wood, the law of conservation of mass (质量守恒定律) tells us that the mass of ash and gases produced equals the mass of the original wood.

在燃烧木材时，质量守恒定律（law of conservation of mass）告诉我们，产生的灰烬和气体的质量等于原始木材的质量。

4.In chemical reactions, the law of conservation of mass (质量守恒定律) ensures that matter is neither created nor destroyed.

在化学反应中，质量守恒定律（law of conservation of mass）确保物质既不会被创造也不会被销毁。

5.In a closed system, the total mass of reactants must equal the total mass of products, according to the law of conservation of mass (质量守恒定律).

在一个封闭系统中，根据质量守恒定律（law of conservation of mass），反应物的总质量必须等于生成物的总质量。

作文

The law of conservation of mass states that mass cannot be created or destroyed in a closed system through ordinary chemical reactions or physical changes. This fundamental principle was formulated by Antoine Lavoisier in the late 18th century and has become a cornerstone of modern chemistry and physics. Understanding the law of conservation of mass is crucial for anyone studying science, as it provides a foundational framework for understanding how substances interact and transform during chemical reactions.To illustrate the importance of the law of conservation of mass, consider a simple chemical reaction such as the combustion of methane (CH₄) in oxygen (O₂). When methane burns, it reacts with oxygen to produce carbon dioxide (CO₂) and water (H₂O). According to the law of conservation of mass, the total mass of the reactants (methane and oxygen) must equal the total mass of the products (carbon dioxide and water). If we start with 16 grams of methane and 32 grams of oxygen, we must end up with a total mass of 48 grams of products. This principle allows chemists to predict the outcomes of reactions and calculate the amounts of substances needed for a reaction to occur.Furthermore, the law of conservation of mass has significant implications beyond the realm of chemistry. In environmental science, for example, it helps us understand the cycling of materials in ecosystems. Nutrients are neither created nor destroyed; they are transformed and recycled through various biological processes. This understanding emphasizes the importance of sustainability and responsible resource management. When we recognize that materials are conserved, we can better appreciate the impact of pollution and waste on our environment.In addition, the law of conservation of mass is essential in engineering and manufacturing processes. Engineers must account for mass when designing systems and processes to ensure efficiency and safety. For instance, in the design of engines or reactors, understanding how mass flows and transforms is vital for optimizing performance and minimizing waste.Despite its straightforward concept, the law of conservation of mass can sometimes lead to misconceptions. Many people might assume that if a substance appears to disappear (for example, when ice melts into water), mass is lost. However, if we measure the mass of the ice before it melts and the mass of the water after it melts, we find that the total mass remains constant. This highlights the importance of careful measurement and observation in scientific inquiry.In conclusion, the law of conservation of mass is a fundamental principle that underpins much of science. It teaches us that matter is neither created nor destroyed, only transformed. This principle is not only vital for chemists but also for environmental scientists, engineers, and anyone interested in understanding the natural world. By grasping the significance of the law of conservation of mass, we can better appreciate the interconnectedness of all things and the importance of maintaining balance within our ecosystems.

质量守恒定律指出，在封闭系统中，质量不能通过普通化学反应或物理变化被创造或销毁。这个基本原则是由安托万·拉瓦锡在18世纪末提出的，并已成为现代化学和物理学的基石。理解质量守恒定律对于任何学习科学的人来说都是至关重要的，因为它提供了一个基础框架，用于理解物质在化学反应中的相互作用和转化。为了说明质量守恒定律的重要性，考虑一个简单的化学反应，例如甲烷（CH₄）在氧气（O₂）中的燃烧。当甲烷燃烧时，它与氧气反应生成二氧化碳（CO₂）和水（H₂O）。根据质量守恒定律，反应物（甲烷和氧气）的总质量必须等于产物（二氧化碳和水）的总质量。如果我们开始时有16克甲烷和32克氧气，那么我们必须得到48克的产物。这一原则使化学家能够预测反应的结果并计算反应所需物质的数量。此外，质量守恒定律在化学领域之外也具有重要意义。例如，在环境科学中，它帮助我们理解生态系统中物质的循环。营养物质既不被创造也不被销毁；它们通过各种生物过程进行转化和回收。这种理解强调了可持续性和负责任资源管理的重要性。当我们认识到物质是被保存的时，我们可以更好地理解污染和废物对环境的影响。此外，质量守恒定律在工程和制造过程中也是必不可少的。工程师在设计系统和流程时必须考虑质量，以确保效率和安全。例如，在发动机或反应器的设计中，理解质量如何流动和转化对于优化性能和最小化浪费至关重要。尽管其概念简单，质量守恒定律有时会导致误解。许多人可能会假设，如果某种物质似乎消失（例如，当冰融化成水时），质量就会丢失。然而，如果我们在冰融化之前测量冰的质量，并在融化后测量水的质量，我们会发现总质量保持不变。这突显了在科学探究中仔细测量和观察的重要性。总之，质量守恒定律是一个基础原则，它支撑着大部分科学。它教导我们物质既不被创造也不被销毁，只是转化。这个原则不仅对化学家至关重要，对环境科学家、工程师以及任何对理解自然界感兴趣的人来说也是如此。通过掌握质量守恒定律的重要性，我们可以更好地欣赏万物之间的相互联系，以及在我们的生态系统中保持平衡的重要性。