average boiling point

简明释义

平均沸点

英英释义

例句

1.Different compounds have varying average boiling points, which can help in their identification.

不同的化合物有不同的平均沸点，这可以帮助它们的识别。

2.In distillation, the average boiling point is crucial for separating mixtures.

在蒸馏过程中，平均沸点对分离混合物至关重要。

3.The average boiling point of ethanol is lower than that of water.

乙醇的平均沸点低于水的沸点。

4.Chemists often refer to the average boiling point when determining the purity of a substance.

化学家在确定物质的纯度时，经常提到平均沸点。

5.The average boiling point of water is 100 degrees Celsius at sea level.

水的平均沸点在海平面上是100摄氏度。

作文

The concept of the average boiling point is fundamental in the field of chemistry and plays a crucial role in various industrial processes. Understanding this term requires a grasp of what boiling point means in general. The boiling point of a substance is the temperature at which it changes from a liquid to a gas. This transition occurs when the vapor pressure of the liquid equals the atmospheric pressure surrounding it. However, the boiling point can vary depending on the purity of the substance and the external conditions such as pressure. Therefore, scientists often refer to the average boiling point when discussing substances that exist in mixtures or those that are not perfectly pure.In practical applications, the average boiling point is particularly significant in distillation processes. Distillation is a method used to separate components of a mixture based on their different boiling points. For example, in the petroleum industry, crude oil is heated, and its components are separated at their respective boiling points. Knowing the average boiling point of various hydrocarbons allows engineers to optimize the distillation process, ensuring that valuable products like gasoline and diesel are efficiently extracted.Moreover, the average boiling point can also provide insights into the properties of substances. For instance, substances with lower average boiling points tend to be more volatile, meaning they evaporate more readily than those with higher boiling points. This characteristic is essential in applications such as fragrance manufacturing, where volatile compounds are desirable for producing appealing scents.In the laboratory, chemists frequently utilize the average boiling point to identify unknown substances. By measuring the boiling point of a liquid sample and comparing it to known values, they can deduce its identity. This technique is particularly useful in organic chemistry, where many compounds have well-documented boiling points.Furthermore, the average boiling point is influenced by intermolecular forces within a substance. For example, substances with strong hydrogen bonding, such as water, have relatively high boiling points compared to similar-sized molecules that do not engage in such interactions. Understanding these relationships helps chemists predict how different substances will behave under various conditions.In summary, the average boiling point is a vital concept in chemistry that impacts both theoretical understanding and practical applications. From industrial processes like distillation to laboratory identification techniques, the knowledge of boiling points—especially the average boiling point—is indispensable. As we continue to explore and innovate in the field of chemistry, the importance of this concept will only grow, highlighting the intricate connections between physical properties and chemical behavior. Whether in research, industry, or education, mastering the idea of the average boiling point will enhance our understanding of the materials that make up our world.

平均沸点的概念在化学领域中是基础性的，并在各种工业过程中发挥着至关重要的作用。理解这个术语需要掌握沸点的一般含义。物质的沸点是其从液态转变为气态的温度。当液体的蒸汽压等于其周围的气压时，这一转变就会发生。然而，沸点可能会因物质的纯度和外部条件（如压力）而有所不同。因此，科学家在讨论存在于混合物中的物质或那些不完全纯净的物质时，常常会提到平均沸点。在实际应用中，平均沸点在蒸馏过程中尤为重要。蒸馏是一种基于不同沸点分离混合物成分的方法。例如，在石油工业中，原油被加热，其成分在各自的沸点处分离。了解各种烃的平均沸点使工程师能够优化蒸馏过程，确保有效提取出汽油和柴油等有价值的产品。此外，平均沸点还可以提供有关物质特性的见解。例如，具有较低平均沸点的物质往往更具挥发性，意味着它们比沸点较高的物质更容易蒸发。这一特性在香料制造等应用中至关重要，因为挥发性化合物对于产生吸引人的气味是非常可取的。在实验室中，化学家经常利用平均沸点来识别未知物质。通过测量液体样本的沸点并将其与已知值进行比较，他们可以推断出其身份。这种技术在有机化学中尤其有用，因为许多化合物都有良好记录的沸点。此外，平均沸点还受到物质内分子间作用力的影响。例如，具有强氢键的物质（如水）相比于同样大小但不参与这种相互作用的分子，具有相对较高的沸点。理解这些关系有助于化学家预测不同物质在各种条件下的行为。总之，平均沸点是化学中一个至关重要的概念，它影响着理论理解和实际应用。从蒸馏等工业过程到实验室识别技术，对沸点的知识——特别是平均沸点——是不可或缺的。随着我们在化学领域的不断探索和创新，这一概念的重要性只会增加，突显出物理特性与化学行为之间的复杂联系。无论是在研究、工业还是教育中，掌握平均沸点的概念将增强我们对构成我们世界的材料的理解。