mean molecular weight

简明释义

平均分子量

英英释义

例句

1.The mean molecular weight 平均分子量 of a solution affects its osmotic pressure.

溶液的平均分子量 mean molecular weight 影响其渗透压。

2.The mean molecular weight 平均分子量 of air is approximately 29 g/mol.

空气的平均分子量 mean molecular weight 约为29 g/mol。

3.The calculation of the mean molecular weight 平均分子量 is essential for determining the properties of gases.

计算平均分子量 mean molecular weight 对于确定气体的性质是至关重要的。

4.In polymer chemistry, the mean molecular weight 平均分子量 can influence the material's strength and flexibility.

在聚合物化学中，平均分子量 mean molecular weight 会影响材料的强度和灵活性。

5.To calculate the mean molecular weight 平均分子量, you need to know the individual molecular weights and their respective abundances.

要计算平均分子量 mean molecular weight，你需要知道各个分子量及其相应的丰度。

作文

The concept of mean molecular weight is fundamental in the field of chemistry and physics. It refers to the average mass of molecules in a given sample of a substance, weighted by the abundance of each molecule's mass. Understanding mean molecular weight is essential for various applications, including calculating the properties of gases, solutions, and polymers. To grasp the significance of mean molecular weight, one must first understand the difference between molecular weight and mean molecular weight. Molecular weight is the mass of a single molecule, while mean molecular weight provides an average that takes into account the distribution of different molecules within a sample. For instance, in a mixture of gases, different gas molecules will have different molecular weights. The mean molecular weight gives us a more comprehensive understanding of the mixture's overall characteristics.In practical terms, mean molecular weight is crucial when dealing with ideal gas laws. The ideal gas law states that PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature. Here, the number of moles (n) can be calculated using the mean molecular weight. By knowing the mean molecular weight, scientists can determine how many moles of gas are present in a specific volume under certain conditions. This is particularly useful in fields such as environmental science, where understanding gas concentrations in the atmosphere is vital.Moreover, in the realm of biochemistry, mean molecular weight plays an important role in characterizing macromolecules like proteins and nucleic acids. Proteins, for example, are composed of various amino acids, each contributing to the total mean molecular weight of the protein. Knowing the mean molecular weight of a protein can help researchers predict its behavior in biological systems, its solubility, and its interaction with other molecules. In polymer science, mean molecular weight is a key parameter that influences the physical properties of polymers. Polymers can be made up of chains of varying lengths, leading to a distribution of molecular weights. The mean molecular weight of a polymer affects its viscosity, tensile strength, and melting point. Therefore, controlling the mean molecular weight during the synthesis of polymers is critical for tailoring materials for specific applications.In summary, the term mean molecular weight is not just a simple measurement; it is a vital concept that helps scientists and engineers understand the behavior of different substances in various fields. From gas laws to biochemical interactions and material properties, mean molecular weight provides insights that are essential for both theoretical studies and practical applications. As we continue to explore the complexities of matter, the importance of mean molecular weight will undoubtedly remain at the forefront of scientific inquiry and innovation.

“平均分子量”这一概念在化学和物理学领域至关重要。它指的是在给定物质样本中，分子的平均质量，按照每种分子质量的丰度加权。理解“平均分子量”对各种应用至关重要，包括计算气体、溶液和聚合物的性质。为了掌握“平均分子量”的重要性，首先必须了解分子量和平均分子量之间的区别。分子量是单个分子的质量，而“平均分子量”提供了一个平均值，考虑了样本中不同分子的分布。例如，在气体混合物中，不同的气体分子将具有不同的分子量。“平均分子量”使我们能够更全面地理解混合物的整体特性。在实际应用中，“平均分子量”在处理理想气体定律时至关重要。理想气体定律表明PV = nRT，其中P是压力，V是体积，n是摩尔数，R是理想气体常数，T是温度。在这里，摩尔数（n）可以使用“平均分子量”进行计算。通过知道“平均分子量”，科学家可以确定在特定条件下特定体积中存在多少摩尔的气体。这在环境科学等领域尤为重要，因为了解大气中气体浓度至关重要。此外，在生物化学领域，“平均分子量”在表征大分子如蛋白质和核酸方面起着重要作用。例如，蛋白质由多种氨基酸组成，每种氨基酸都对蛋白质的总“平均分子量”有所贡献。了解蛋白质的“平均分子量”可以帮助研究人员预测其在生物系统中的行为、溶解度及与其他分子的相互作用。在聚合物科学中，“平均分子量”是影响聚合物物理性质的关键参数。聚合物可以由不同长度的链组成，从而导致分子量的分布。“平均分子量”影响聚合物的粘度、抗拉强度和熔点。因此，在聚合物合成过程中控制“平均分子量”对于定制特定应用的材料至关重要。总之，术语“平均分子量”不仅仅是一个简单的测量；它是一个重要概念，帮助科学家和工程师理解不同物质在各个领域的行为。从气体法则到生物化学相互作用，再到材料性质，“平均分子量”提供的见解对于理论研究和实际应用都是必不可少的。随着我们继续探索物质的复杂性，“平均分子量”的重要性无疑将始终处于科学探究和创新的前沿。