internal energy

简明释义

内能

英英释义

例句

1.The total amount of internal energy is a key factor in determining the temperature of a system.

系统的温度主要由其总的内能决定。

2.In an adiabatic process, the internal energy remains constant despite changes in pressure and volume.

在绝热过程中，尽管压力和体积发生变化，内能仍然保持不变。

3.The change in internal energy can be calculated using the first law of thermodynamics.

可以利用热力学第一定律计算内能的变化。

4.When a gas expands, its internal energy may decrease if no heat is added.

当气体膨胀时，如果没有添加热量，其内能可能会减少。

5.During the heating process, the internal energy of the substance increases.

在加热过程中，物质的内能增加。

作文

Internal energy is a fundamental concept in thermodynamics, representing the total energy contained within a system. This energy is derived from two main sources: the kinetic energy of the particles that make up the system and the potential energy arising from the interactions between these particles. Understanding internal energy (内能) is crucial for analyzing various physical processes, such as heat transfer, phase changes, and chemical reactions.In everyday life, we encounter numerous examples where internal energy (内能) plays a significant role. For instance, when we heat water on a stove, the heat energy transferred to the water increases its internal energy (内能). As the internal energy (内能) rises, the water molecules move more vigorously, leading to an increase in temperature. When the water reaches its boiling point, the internal energy (内能) continues to increase, enabling the molecules to break free from their liquid state and enter the gaseous phase as steam.The concept of internal energy (内能) is not only relevant in simple systems but also in more complex scenarios, such as in engines and refrigerators. In an engine, fuel combustion increases the internal energy (内能) of the gases, which then expand and do work on the pistons, converting thermal energy into mechanical energy. Conversely, in a refrigerator, work is done on the refrigerant to decrease its internal energy (内能), allowing it to absorb heat from the interior of the fridge, thus keeping the contents cool.Moreover, the first law of thermodynamics, which states that energy cannot be created or destroyed, emphasizes the importance of internal energy (内能). According to this principle, any change in the internal energy (内能) of a system is equal to the heat added to the system minus the work done by the system. This relationship helps us understand how energy flows in and out of a system and how it affects the internal energy (内能) during various processes.Understanding internal energy (内能) also has practical applications in fields like engineering, environmental science, and even biology. Engineers must consider internal energy (内能) when designing systems that involve heat exchange, ensuring efficiency and safety. In environmental science, the internal energy (内能) of natural systems can influence climate patterns and ecological dynamics. Biologists study the internal energy (内能) of living organisms to understand metabolic processes and energy transformations that sustain life.In conclusion, internal energy (内能) is a vital concept that underpins many physical phenomena and practical applications. By grasping the principles of internal energy (内能), we can better comprehend the behavior of materials and systems in our world. Whether it is through cooking, operating machinery, or studying the environment, the implications of internal energy (内能) are pervasive, highlighting its significance in both theoretical and applied sciences.