law of conservation of mass

简明释义

质量守恒定律

英英释义

例句

1.In a closed container, the mass of gas released during a reaction will equal the mass of the remaining substances, confirming the law of conservation of mass (质量守恒定律).

在一个封闭容器中，反应过程中释放的气体质量将等于剩余物质的质量，从而确认了质量守恒定律（质量守恒定律）。

2.The law of conservation of mass (质量守恒定律) is crucial in understanding how substances interact in physical and chemical processes.

质量守恒定律（质量守恒定律）对于理解物质在物理和化学过程中的相互作用至关重要。

3.In a closed system, the total mass before a chemical reaction is equal to the total mass after the reaction, illustrating the law of conservation of mass (质量守恒定律).

在一个封闭系统中，化学反应前的总质量等于反应后的总质量，这说明了质量守恒定律（质量守恒定律）。

4.When baking a cake, the combined weight of the ingredients remains constant, demonstrating the law of conservation of mass (质量守恒定律).

在烤蛋糕时，所有成分的总重量保持不变，这展示了质量守恒定律（质量守恒定律）。

5.During a combustion reaction, the mass of the reactants equals the mass of the products, which follows the law of conservation of mass (质量守恒定律).

在燃烧反应中，反应物的质量等于产品的质量，这遵循了质量守恒定律（质量守恒定律）。

作文

The law of conservation of mass states that in a closed system, the total mass of the substances involved in a chemical reaction remains constant, regardless of the changes that occur during the reaction. This fundamental principle was first formulated by Antoine Lavoisier in the late 18th century, and it has since become a cornerstone of modern chemistry. Understanding the law of conservation of mass is crucial for students and professionals in the field, as it provides a foundation for understanding how chemical reactions occur and how matter interacts with energy.To illustrate this principle, 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 were to measure the mass of the reactants before the reaction and then measure the mass of the products after the reaction, we would find that they are equal, assuming no mass was lost to the surroundings.This principle not only applies to chemical reactions but also to physical processes. For example, when ice melts into water, the mass remains unchanged. The molecules of water are simply rearranged in a different form, but the total mass before and after the melting process is the same. This observation reinforces the importance of the law of conservation of mass in both chemistry and physics.In practical applications, the law of conservation of mass is essential for balancing chemical equations. Chemists use this law to ensure that the number of atoms of each element is conserved during a reaction. For instance, in the reaction of hydrogen and oxygen to form water, the balanced equation is 2H2 + O2 → 2H2O. Here, there are four hydrogen atoms and two oxygen atoms on both sides of the equation, demonstrating that mass is conserved.Moreover, the law of conservation of mass has significant implications in environmental science and engineering. It helps in understanding processes such as combustion, pollution, and waste management. By applying this law, scientists can predict how pollutants will behave in the environment and design systems that minimize waste and maximize efficiency.In conclusion, the law of conservation of mass is a fundamental concept that underlies much of what we understand about the physical world. Its applications span various fields, from chemistry and physics to environmental science and engineering. By recognizing that mass cannot be created or destroyed, we can better comprehend the intricate processes that govern our universe. As we continue to explore the complexities of matter and energy, the law of conservation of mass will remain a guiding principle in our quest for knowledge.

质量守恒定律（law of conservation of mass）表明，在一个封闭系统中，参与化学反应的物质的总质量保持不变，无论反应过程中发生何种变化。这个基本原理最早由安托万·拉瓦锡在18世纪末提出，此后成为现代化学的基石。理解质量守恒定律对学生和专业人士至关重要，因为它为理解化学反应的发生及物质与能量的相互作用提供了基础。为了说明这一原则，考虑一个简单的化学反应，比如甲烷（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。如果我们在反应前测量反应物的质量，然后在反应后测量产物的质量，我们会发现它们是相等的，假设没有质量损失到环境中。这一原则不仅适用于化学反应，也适用于物理过程。例如，当冰融化成水时，质量保持不变。水分子的排列形式发生了变化，但融化过程前后的总质量是相同的。这一观察进一步强调了质量守恒定律在化学和物理学中的重要性。在实际应用中，质量守恒定律对平衡化学方程式至关重要。化学家利用这一法则确保在反应过程中每种元素的原子数量得到保存。例如，在氢和氧反应生成水的过程中，平衡方程为2H2 + O2 → 2H2O。在这个方程中，反应前后都有四个氢原子和两个氧原子，证明了质量得到了守恒。此外，质量守恒定律在环境科学和工程学中具有重要意义。它有助于理解燃烧、污染和废物管理等过程。通过应用这一法则，科学家可以预测污染物在环境中的行为，并设计最大限度减少废物和提高效率的系统。总之，质量守恒定律是一个基本概念，支撑着我们对物理世界的理解。它的应用跨越多个领域，从化学和物理到环境科学和工程。通过认识到质量无法被创造或销毁，我们可以更好地理解支配我们宇宙的复杂过程。随着我们继续探索物质和能量的复杂性，质量守恒定律将始终是我们追求知识的指导原则。