molar depression of freezing point

简明释义

克分子冰点降低

英英释义

例句

1.When salt is added to ice, it lowers the molar depression of freezing point 摩尔冰点降低, allowing the ice to melt at lower temperatures.

当盐加入冰中时，它降低了摩尔冰点降低，使冰在更低温度下融化。

2.In a laboratory experiment, we measured the molar depression of freezing point 摩尔冰点降低 of various solutes.

在实验室实验中，我们测量了各种溶质的摩尔冰点降低。

3.The molar depression of freezing point 摩尔冰点降低 can be used to determine the molecular weight of unknown compounds.

可以使用摩尔冰点降低来确定未知化合物的分子量。

4.Understanding the molar depression of freezing point 摩尔冰点降低 helps chemists predict how substances behave in solution.

理解摩尔冰点降低有助于化学家预测物质在溶液中的行为。

5.The formula for calculating the molar depression of freezing point 摩尔冰点降低 is essential in colligative properties.

计算摩尔冰点降低的公式在集合性质中是必不可少的。

作文

The concept of molar depression of freezing point is an essential principle in the field of physical chemistry, particularly when studying solutions and their properties. This phenomenon occurs when a solute is added to a solvent, resulting in a decrease in the temperature at which the solvent freezes. The molar depression of freezing point can be quantitatively expressed using the formula: ΔTf = i * Kf * m, where ΔTf is the change in freezing point, i is the van 't Hoff factor (which accounts for the number of particles the solute dissociates into), Kf is the freezing point depression constant specific to the solvent, and m is the molality of the solution.Understanding the molar depression of freezing point is crucial in various real-world applications. For instance, it plays a significant role in the food industry, where salt is often added to ice to create a colder environment for freezing processes. By lowering the freezing point of water, the salt allows for more efficient cooling, which is particularly important in preserving food products. Additionally, this principle is fundamental in antifreeze solutions used in vehicles. Ethylene glycol, commonly found in antifreeze, lowers the freezing point of the liquid in the radiator, preventing the coolant from freezing in cold temperatures and ensuring that the engine operates effectively.Moreover, the molar depression of freezing point also has implications in biological systems. Cells contain various solutes, and understanding how these solutes affect the freezing point of cellular fluids is important in cryopreservation techniques. When biological samples are frozen for long-term storage, controlling the freezing point depression is vital to prevent ice crystal formation, which can damage cellular structures.In laboratory settings, chemists often use the molar depression of freezing point to determine the molar mass of unknown solutes. By measuring the change in freezing point of a solvent when a known quantity of solute is dissolved, scientists can calculate the molar mass based on the degree of freezing point depression observed. This method is particularly useful for substances that may not easily be vaporized or distilled, providing a reliable alternative for characterization.In summary, the molar depression of freezing point is a fundamental concept that bridges theoretical chemistry with practical applications. Its relevance spans across multiple industries, including food preservation, automotive engineering, and biological research. As we continue to explore the properties of solutions and their behaviors under various conditions, the understanding of molar depression of freezing point will remain a cornerstone in the study of physical chemistry. By applying this knowledge, scientists and professionals can innovate and improve processes that impact our daily lives significantly.

“摩尔冰点降低”是物理化学领域中的一个重要原理，尤其是在研究溶液及其性质时。当溶质被添加到溶剂中时，会导致溶剂的冻结温度降低，这一现象被称为“摩尔冰点降低”。“摩尔冰点降低”可以用公式ΔTf = i * Kf * m定量表达，其中ΔTf是冰点变化，i是范特霍夫因子（表示溶质解离成的粒子数），Kf是特定于溶剂的冰点降低常数，m是溶液的摩尔浓度。理解“摩尔冰点降低”在许多实际应用中至关重要。例如，在食品工业中，盐通常被添加到冰中以创造一个更冷的环境进行冷冻处理。通过降低水的冰点，盐使冷却过程更加高效，这在保存食品产品时尤为重要。此外，这一原理在汽车使用的防冻液中也具有重要意义。乙二醇是常见的防冻液成分，它降低了散热器中液体的冰点，防止冷却液在低温下冻结，从而确保发动机有效运作。此外，“摩尔冰点降低”在生物系统中也有影响。细胞中含有各种溶质，理解这些溶质如何影响细胞液体的冰点对于冷冻保存技术至关重要。当生物样本被冷冻以进行长期储存时，控制冰点降低是防止冰晶形成的重要因素，因为冰晶可能会损害细胞结构。在实验室环境中，化学家经常利用“摩尔冰点降低”来确定未知溶质的摩尔质量。通过测量已知量的溶质溶解时溶剂的冰点变化，科学家可以根据观察到的冰点降低程度计算摩尔质量。这一方法对于不易蒸发或蒸馏的物质特别有用，提供了一种可靠的特征化替代方案。总之，“摩尔冰点降低”是一个基本概念，连接了理论化学与实际应用。它的相关性跨越多个行业，包括食品保存、汽车工程和生物研究。随着我们继续探索溶液的性质及其在各种条件下的行为，对“摩尔冰点降低”的理解将始终是物理化学研究的基石。通过应用这一知识，科学家和专业人士能够创新并改善影响我们日常生活的过程。