law of conservation of mass

简明释义

质量守恒定律

英英释义

例句

1.The law of conservation of mass (质量守恒定律) is fundamental in chemistry and helps predict the outcomes of reactions.

质量守恒定律在化学中是基本的，帮助预测反应的结果。

2.In a closed system, the total mass before and after a chemical reaction remains constant, illustrating the law of conservation of mass (质量守恒定律).

在一个封闭系统中，化学反应前后的总质量保持不变，这说明了质量守恒定律。

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.

燃烧木材时，质量守恒定律告诉我们，产生的灰烬和气体的质量等于原始木材的质量。

4.In an experiment, students observed that the mass of reactants equaled the mass of products, confirming the law of conservation of mass (质量守恒定律).

在一次实验中，学生们观察到反应物的质量等于产品的质量，证实了质量守恒定律。

5.During a closed-system reaction, no matter how the substances change, the law of conservation of mass (质量守恒定律) ensures that mass is not lost.

在一个封闭系统的反应中，无论物质如何变化，质量守恒定律确保质量不会丢失。

作文

The concept of the law of conservation of mass is foundational in the field of chemistry and physics. It states that mass cannot be created or destroyed in a closed system through ordinary chemical reactions or physical changes. This principle was first formulated by Antoine Lavoisier in the late 18th century, and it has since become a cornerstone of scientific understanding. The law of conservation of mass implies that the total mass of reactants in a chemical reaction will always equal the total mass of the products. This means that when substances undergo a chemical change, their atoms are rearranged, but none are lost or gained in the process.Understanding the law of conservation of mass is crucial for various applications, from laboratory experiments to industrial processes. For example, in a chemical reaction where hydrogen and oxygen combine to form water, the mass of the hydrogen and oxygen before the reaction will equal the mass of the water produced. This principle allows chemists to predict the outcomes of reactions and to balance chemical equations accurately.In practical terms, the law of conservation of mass also plays a significant role in environmental science. When analyzing ecological systems, scientists must consider how matter cycles through environments. For instance, when organic matter decomposes, the mass is not lost; rather, it is transformed into different forms, such as carbon dioxide, water, and nutrients that can be reused by other organisms. This cycle illustrates the importance of the law of conservation of mass in maintaining ecological balance.Moreover, the law of conservation of mass is essential in engineering and technology. In designing chemical reactors, engineers must ensure that the input materials match the expected output. If they fail to account for all mass, it could lead to inefficiencies or hazardous situations. By applying this law, engineers can optimize processes to minimize waste and maximize productivity.It is also important to note that the law of conservation of mass holds true under normal conditions, but there are exceptions at the nuclear level, such as in nuclear reactions where mass can be converted into energy according to Einstein's equation, E=mc². However, in the context of everyday chemical reactions, the law of conservation of mass remains a reliable guideline.In conclusion, the law of conservation of mass is a fundamental principle that governs the behavior of matter in chemical reactions and physical processes. Its implications extend beyond the realm of chemistry, influencing fields such as environmental science and engineering. By recognizing that mass is conserved, scientists and engineers can make informed decisions that lead to sustainable practices and innovations. Understanding and applying the law of conservation of mass is essential for anyone engaged in scientific inquiry or practical applications of chemistry. This principle not only enhances our comprehension of the natural world but also underscores the interconnectedness of all matter within it.

质量守恒定律是化学和物理学领域的基础概念。它指出，在封闭系统中，质量不能通过普通的化学反应或物理变化被创造或消灭。这个原理最早由安托万·拉瓦锡在18世纪末提出，并成为科学理解的基石。质量守恒定律意味着化学反应中反应物的总质量始终等于生成物的总质量。这意味着，当物质经历化学变化时，其原子被重新排列，但在此过程中没有任何原子丢失或获得。理解质量守恒定律对各种应用至关重要，从实验室实验到工业过程。例如，在氢气和氧气结合形成水的化学反应中，反应前氢气和氧气的质量将等于生成的水的质量。这个原理使化学家能够预测反应的结果，并准确地平衡化学方程式。从实际角度来看，质量守恒定律在环境科学中也发挥着重要作用。在分析生态系统时，科学家必须考虑物质如何在环境中循环。例如，当有机物分解时，质量并没有消失；相反，它转化为不同的形式，如二氧化碳、水和其他可以被其他生物重新利用的营养物质。这个循环说明了质量守恒定律在维持生态平衡中的重要性。此外，质量守恒定律在工程和技术中也至关重要。在设计化学反应器时，工程师必须确保输入材料与预期输出匹配。如果他们未能考虑所有质量，可能会导致效率低下或危险情况。通过应用这一法律，工程师可以优化流程，以最小化浪费并最大化生产力。值得注意的是，质量守恒定律在正常条件下成立，但在核层面上存在例外，例如在核反应中，质量可以根据爱因斯坦的方程E=mc²转化为能量。然而，在日常化学反应的背景下，质量守恒定律仍然是一个可靠的指导原则。总之，质量守恒定律是支配化学反应和物理过程中的物质行为的基本原则。它的影响超越了化学领域，影响到环境科学和工程等领域。通过认识到质量是守恒的，科学家和工程师可以做出明智的决策，导致可持续的实践和创新。理解和应用质量守恒定律对任何从事科学研究或化学实际应用的人来说都是必不可少的。这一原则不仅增强了我们对自然界的理解，还强调了其中所有物质的相互联系。