alkanes

简明释义

英[ˈælkeɪnz]美[ˈælkeɪnz]

n. 烷类，[有化]链烷烃；烷属烃（alkane 的复数）

英英释义

单词用法

同义词

反义词

例句

1.Other components are the homologous alkanes, ethane, propane, and higher hydrocarbons.

其他组分有同系烷、乙烷、丙烷以及高分子碳氢化合物。

2.These normal alkanes offer the favourable mineralization information and have the tracer significance for the gold mineralization.

这些不同类型的正构烷烃提供了丰富的成矿信息，具有成矿作用的示踪意义。

3.Moreover, water has no obvious effect on the hydrogen isotopic compositions of individual n-alkanes in the simulation test.

热模拟实验中水的存在对热解烃中正构烷烃单体氢同位素组成并没有产生明显的影响。

4.Chemical fossils (e. g. alkanes and porphyrins) are often the only evidence for life in rocks of PRECAMBRIAN age.

化学化石(烷烃和卟啉)是前寒武纪地层中生命存在的唯一证据。

5.The general USES of alkanes may be divided into three categories.

烷的一般用途可分为三个方面。

6.Methane and propane are alkanes.

甲烷和丙烷是烷烃。

7.That cyclo prefix means that unlike standard alkanes, which come in chains, this one's a ring. The shape gives cycloalkanes a higher melting point.

当“环”这个前缀出现时我们就知道这个烷烃的分子结构不同于普通链状烷烃，他是环装的，因此也有着更高的熔点。

8.Codexis's enzymes and bacteria can turn sugar into molecules called straight-chain alkanes which have between 12 and 16 carbon atoms in them.

公司的酶和细菌能够将蔗糖转为叫做直链烷烃的分子，该类型的分子含有12到16个碳原子。

9.Many alkanes 烷烃 are used as fuels in heating and engines.

许多烷烃被用作加热和发动机的燃料。

10.The boiling points of alkanes 烷烃 increase with the length of the carbon chain.

烷烃的沸点随着碳链长度的增加而增加。

11.The combustion of alkanes 烷烃 produces carbon dioxide and water.

烷烃的燃烧产生二氧化碳和水。

12.In organic chemistry, alkanes 烷烃 are the simplest hydrocarbons.

在有机化学中，烷烃是最简单的碳氢化合物。

13.Natural gas is primarily composed of alkanes 烷烃, such as methane.

天然气主要由烷烃组成，例如甲烷。

作文

Alkanes are a fundamental class of hydrocarbons that play a significant role in both organic chemistry and everyday life. They are saturated hydrocarbons, meaning that they consist solely of carbon and hydrogen atoms, with single bonds connecting the carbon atoms. The general formula for alkanes is CnH2n+2, where 'n' represents the number of carbon atoms in the molecule. This simple structure allows alkanes to be relatively stable and unreactive compared to other types of hydrocarbons, such as alkenes and alkynes, which contain double and triple bonds, respectively. 烷烃 is the term used to describe these compounds in Chinese.One of the most common examples of alkanes is methane, which is the simplest alkane with one carbon atom and four hydrogen atoms (CH4). Methane is not only a primary component of natural gas but also serves as an essential fuel source worldwide. Other examples of alkanes include ethane (C2H6), propane (C3H8), and butane (C4H10). These compounds are often found in fossil fuels and are used extensively in various applications, including heating, cooking, and powering vehicles.Alkanes can be categorized into two main types: straight-chain alkanes and branched-chain alkanes. Straight-chain alkanes have their carbon atoms arranged in a linear fashion, while branched-chain alkanes contain one or more branches off the main carbon chain. This branching can lead to different physical and chemical properties, such as boiling points and reactivity. For instance, isobutane (a branched form of butane) has a lower boiling point than n-butane, which is its straight-chain counterpart. Understanding these differences is crucial for chemists and engineers alike, as it helps them select the appropriate alkane for specific industrial processes.The significance of alkanes extends beyond their chemical structure; they are also pivotal in the field of energy production. The combustion of alkanes releases a considerable amount of energy, making them valuable as fuels. When burned in the presence of oxygen, alkanes produce carbon dioxide and water, releasing heat that can be harnessed for various purposes. This reaction is fundamental to many energy systems, from power plants to internal combustion engines.Moreover, alkanes are not just limited to energy applications; they are also vital in the production of numerous chemicals and materials. For example, alkanes can be transformed through processes like cracking and reforming to create more complex hydrocarbons and synthetic materials, such as plastics and lubricants. This versatility makes alkanes indispensable in the chemical industry.In conclusion, alkanes, or 烷烃, are essential hydrocarbons that serve as the backbone of many chemical processes and energy systems. Their unique properties, stability, and abundance in nature make them a topic of great interest in both academic research and industrial applications. As we continue to explore the world of chemistry, understanding the role of alkanes will undoubtedly enhance our comprehension of organic compounds and their impact on our daily lives.