melting point

简明释义

熔点

英英释义

例句

1.The melting point of butter is lower than that of most oils.

黄油的熔点低于大多数油脂。

2.Gold has a high melting point, making it suitable for various applications.

黄金具有高熔点，使其适用于多种应用。

3.When heated, the melting point of chocolate is around 30-32 degrees Celsius.

加热时，巧克力的熔点大约在30-32摄氏度。

4.The melting point of ice is 0 degrees Celsius.

冰的熔点是0摄氏度。

5.Different metals have different melting points, affecting their use in construction.

不同金属有不同的熔点，影响它们在建筑中的使用。

作文

The concept of the melting point is fundamental in both chemistry and everyday life. It refers to the temperature at which a solid becomes a liquid. This phenomenon occurs because the heat energy supplied to the solid causes its molecules to vibrate more vigorously, eventually overcoming the forces that hold them in a rigid structure. Understanding the melting point is crucial for various applications, from cooking to material science.In the kitchen, for example, knowing the melting point of butter can significantly affect the outcome of a recipe. Butter typically melts at around 32 to 35 degrees Celsius. If you heat it too quickly or to a temperature beyond its melting point, you may end up with burnt butter instead of the smooth, creamy texture desired for baking. Similarly, when making chocolate, the melting point plays a vital role. Different types of chocolate have varying melting points, which affects how they should be tempered and used in confections.In the realm of materials science, the melting point is a critical property that helps engineers and scientists select appropriate materials for specific applications. For instance, metals like aluminum have a melting point of about 660 degrees Celsius, while iron has a much higher melting point of approximately 1,538 degrees Celsius. This knowledge is essential when designing structures that must withstand high temperatures, such as bridges or engines.The melting point can also serve as an indicator of purity. Pure substances tend to have sharp and well-defined melting points. In contrast, impure substances often exhibit a range of melting temperatures. This principle is utilized in laboratories to assess the purity of compounds. For example, if a chemist measures the melting point of a sample and finds it lower than expected, this may indicate the presence of impurities.Moreover, the melting point is not a fixed value; it can be influenced by external factors such as pressure. For example, the melting point of ice decreases under high pressure, which is why ice can melt at temperatures below 0 degrees Celsius in certain conditions. This phenomenon is important in understanding natural processes, such as the behavior of glaciers and icebergs in the ocean.In summary, the melting point is a significant concept that extends beyond the confines of scientific theory. It plays a vital role in cooking, engineering, and even environmental science. By grasping the importance of the melting point, we can better appreciate the complexities of the materials we use every day and the science that underpins them. Whether we are baking a cake or designing a skyscraper, the melting point is a key factor that influences our choices and outcomes. Understanding this concept equips us with the knowledge to navigate both culinary and scientific challenges effectively.

“熔点”这一概念在化学和日常生活中都是基础性的。它指的是固体变为液体的温度。这一现象发生是因为施加于固体的热量使其分子振动得更加剧烈，最终克服了将它们保持在刚性结构中的力。理解“熔点”对于从烹饪到材料科学的各种应用至关重要。例如，在厨房里，知道黄油的“熔点”可以显著影响食谱的结果。黄油通常在大约32到35摄氏度时融化。如果你加热得太快或超过其“熔点”，你可能会得到烧焦的黄油，而不是烘焙所需的光滑、奶油状的质地。同样，在制作巧克力时，“熔点”也起着至关重要的作用。不同类型的巧克力有不同的“熔点”，这影响着它们在糖果中的调温和使用方式。在材料科学领域，“熔点”是一个关键属性，帮助工程师和科学家选择适合特定应用的材料。例如，铝的“熔点”约为660摄氏度，而铁的“熔点”则高得多，约为1538摄氏度。这一知识在设计必须承受高温的结构（如桥梁或发动机）时至关重要。“熔点”还可以作为纯度的指示。纯物质往往具有尖锐且明确的“熔点”。而不纯物质通常表现出一系列的熔化温度。这一原理在实验室中用于评估化合物的纯度。例如，如果化学家测量某个样品的“熔点”，发现其低于预期，这可能表明存在杂质。此外，“熔点”并不是一个固定值；它可以受到压力等外部因素的影响。例如，在高压下，冰的“熔点”降低，这就是为什么在某些条件下，冰可以在低于0摄氏度的温度下融化。这一现象在理解自然过程（如冰川和冰山在海洋中的行为）时非常重要。总之，“熔点”是一个重要的概念，超越了科学理论的范畴。它在烹饪、工程甚至环境科学中发挥着重要作用。通过掌握“熔点”的重要性，我们可以更好地欣赏我们每天使用的材料的复杂性及其背后的科学。无论是在烘焙蛋糕还是设计摩天大楼时，“熔点”都是影响我们选择和结果的关键因素。理解这一概念使我们能够有效地应对烹饪和科学挑战。