law of constant proportion

简明释义

定比律

英英释义

例句

1.One practical application of the law of constant proportion is in determining the composition of unknown substances.

《定比法则》的一个实际应用是在确定未知物质的成分。

2.The law of constant proportion is fundamental in understanding how chemical reactions occur.

《定比法则》在理解化学反应发生的基础上是非常重要的。

3.In chemistry class, we learned about the law of constant proportion through various examples of compounds.

在化学课上，我们通过各种化合物的例子学习了《定比法则》。

4.According to the law of constant proportion, water is always composed of two hydrogen atoms and one oxygen atom.

根据《定比法则》，水始终由两个氢原子和一个氧原子组成。

5.The law of constant proportion states that a compound always contains the same proportion of elements by mass.

《定比法则》表明，化合物总是以相同的质量比例包含元素。

作文

The concept of the law of constant proportion is fundamental in the field of chemistry and materials science. This law states that a chemical compound always contains its component elements in fixed ratio by mass, regardless of the source or how it was prepared. For example, water (H2O) is always composed of two hydrogen atoms and one oxygen atom. This means that no matter where the water comes from—whether it's from a river, a well, or synthesized in a laboratory—the ratio of hydrogen to oxygen remains the same. Understanding the law of constant proportion is crucial for scientists, as it lays the groundwork for stoichiometry, which is the calculation of reactants and products in chemical reactions.In practical applications, this law helps chemists predict how substances will behave during chemical reactions. When we know the fixed proportions of elements in a compound, we can accurately determine how much of each reactant is needed to produce a desired amount of product. For instance, if we want to synthesize water, we need to ensure that we have the correct ratio of hydrogen and oxygen. If we deviate from this ratio, the reaction may not yield water at all, or it may produce an incomplete reaction.Furthermore, the law of constant proportion also plays a significant role in quality control within industries. Manufacturers of chemical products must ensure that their products maintain the correct proportions of elements to meet safety and regulatory standards. For example, pharmaceutical companies must adhere strictly to these proportions when creating medications, as even slight deviations can lead to ineffective or harmful drugs.The historical significance of the law of constant proportion cannot be understated. It was first articulated by the French chemist Joseph Louis Proust in the early 19th century. His work laid the foundation for modern chemistry and helped to establish the idea that compounds are formed from specific ratios of elements. This concept was revolutionary at the time, as it challenged the prevailing theories of matter that suggested elements could combine in varying proportions.Moreover, the law of constant proportion is not limited to chemistry; it has implications in various fields such as physics, biology, and environmental science. For example, in biology, the composition of DNA and proteins follows specific ratios of nucleotides and amino acids, respectively. Understanding these proportions is vital for genetic research and biotechnology.In conclusion, the law of constant proportion is a critical principle that underpins our understanding of chemical compounds and their behavior. Its applications extend beyond chemistry into various scientific disciplines and industries. By adhering to this law, scientists and manufacturers can ensure consistency, safety, and effectiveness in their work. As we continue to explore the complexities of matter and its interactions, the law of constant proportion will remain a cornerstone of scientific inquiry and application.

恒定比例定律是化学和材料科学领域的基本概念。该定律指出，化合物始终以固定的质量比例包含其组成元素，无论来源或制备方式如何。例如，水（H2O）始终由两个氢原子和一个氧原子组成。这意味着，无论水来自哪里——无论是河流、井水，还是在实验室合成的——氢和氧的比例始终保持不变。理解恒定比例定律对科学家至关重要，因为它为化学反应中的反应物和产品的计算奠定了基础。在实际应用中，这条定律帮助化学家预测物质在化学反应中的行为。当我们知道化合物中元素的固定比例时，我们就可以准确地确定需要多少每种反应物来生成所需数量的产品。例如，如果我们想合成水，就必须确保氢和氧的比例正确。如果偏离这个比例，反应可能根本不会产生水，或者可能导致反应不完全。此外，恒定比例定律在各行业的质量控制中也发挥着重要作用。化学产品的制造商必须确保他们的产品维持正确的元素比例，以符合安全和监管标准。例如，制药公司在生产药物时必须严格遵守这些比例，因为即使是轻微的偏差也可能导致无效或有害的药物。恒定比例定律的历史意义不可低估。它最早由法国化学家约瑟夫·路易·普鲁斯特在19世纪初提出。他的工作为现代化学奠定了基础，并帮助建立了化合物由特定比例的元素组成的观点。这个概念在当时具有革命性，因为它挑战了当时有关物质的理论，即元素可以以不同的比例结合。此外，恒定比例定律不仅限于化学，它在物理学、生物学和环境科学等多个领域都有影响。例如，在生物学中，DNA和蛋白质的组成遵循核苷酸和氨基酸的特定比例。理解这些比例对于基因研究和生物技术至关重要。总之，恒定比例定律是支撑我们对化学化合物及其行为理解的关键原则。它的应用超越了化学，延伸到各种科学学科和行业。通过遵循这条定律，科学家和制造商可以确保他们工作的连贯性、安全性和有效性。随着我们继续探索物质及其相互作用的复杂性，恒定比例定律将继续成为科学探究和应用的基石。