adiabatic change

简明释义

绝热变化

英英释义

例句

1.The adiabatic change 绝热变化 of air in the atmosphere can lead to temperature variations as air rises or falls.

大气中空气的adiabatic change 绝热变化 会导致空气上升或下降时温度的变化。

2.An adiabatic change 绝热变化 can be observed in the rapid ascent of a hot air balloon.

在热气球快速上升的过程中，可以观察到一个adiabatic change 绝热变化。

3.In a refrigerator, the refrigerant undergoes an adiabatic change 绝热变化 during the expansion process.

在冰箱中，制冷剂在膨胀过程中经历了一个adiabatic change 绝热变化。

4.During the compression of a gas in a piston, if the process is fast enough, it can be considered an adiabatic change 绝热变化.

在活塞中气体的压缩过程中，如果过程足够快，可以认为这是一个adiabatic change 绝热变化。

5.In thermodynamics, an adiabatic change 绝热变化 occurs when a system does not exchange heat with its surroundings.

在热力学中，adiabatic change 绝热变化 是指一个系统与其周围环境不进行热量交换时发生的变化。

作文

In the realm of thermodynamics, a fundamental concept that often arises is the idea of adiabatic change. This term refers to a process in which a system does not exchange heat with its surroundings. In simpler terms, during an adiabatic change, all energy transfer occurs in the form of work rather than heat. This concept is crucial for understanding various natural phenomena and engineering applications, particularly in the fields of physics and chemistry.To illustrate this concept, consider the example of a gas contained within a piston. If we compress the gas quickly enough, there will be insufficient time for heat to escape to the environment. As a result, the temperature of the gas will rise due to the work done on it. This scenario exemplifies an adiabatic change where the internal energy of the gas increases without any heat transfer.The mathematical representation of adiabatic change can be described using the first law of thermodynamics, which states that the change in internal energy (ΔU) is equal to the heat added to the system (Q) minus the work done by the system (W). For an adiabatic change, since there is no heat exchange (Q = 0), the equation simplifies to ΔU = -W. This relationship highlights how work contributes directly to changes in internal energy without the involvement of heat.Furthermore, adiabatic change is not restricted to ideal gases; it applies to real gases as well, although the behavior may differ under certain conditions. In ideal scenarios, the pressure and volume of the gas can be related through the adiabatic condition, which can be expressed mathematically as PV^γ = constant, where γ (gamma) is the heat capacity ratio (Cp/Cv). This equation signifies that during an adiabatic change, the product of pressure (P) and volume (V) raised to the power of γ remains constant.In practical applications, the concept of adiabatic change plays a vital role in various technologies. For instance, in the design of engines, understanding how gases behave under adiabatic conditions can lead to more efficient combustion processes. Similarly, in refrigeration cycles, engineers utilize adiabatic change principles to optimize the performance of compressors, ensuring that the cooling systems operate effectively.Moreover, the significance of adiabatic change extends beyond mechanical systems. In meteorology, the concept helps explain how air parcels rise in the atmosphere. As these parcels ascend, they expand due to lower pressure at higher altitudes, leading to a drop in temperature without any heat exchange with the surrounding environment. This phenomenon is essential for understanding weather patterns and cloud formation.In conclusion, grasping the concept of adiabatic change is essential for anyone studying thermodynamics or related fields. It provides insight into how energy transformations occur without heat exchange, influencing both theoretical understanding and practical applications. Whether in the context of gas laws, engine efficiency, or atmospheric science, adiabatic change serves as a foundational principle that underpins many natural processes and technological advancements.

在热力学领域，一个经常出现的基本概念是绝热变化。这个术语指的是一个系统与其周围环境之间没有热量交换的过程。简单来说，在绝热变化中，所有的能量转移都是以功的形式进行，而不是热量。这个概念对于理解各种自然现象和工程应用至关重要，特别是在物理学和化学领域。为了说明这一概念，考虑一个气体被封闭在活塞内的例子。如果我们迅速压缩气体，热量就没有足够的时间逃逸到环境中。因此，由于对气体做功，气体的温度将上升。这种情况展示了一个绝热变化的例子，其中气体的内能增加而没有任何热量转移。绝热变化的数学表示可以通过热力学第一定律来描述，该定律指出内能的变化（ΔU）等于加到系统中的热量（Q）减去系统所做的功（W）。对于绝热变化而言，由于没有热量交换（Q = 0），方程简化为ΔU = -W。这个关系突显了功直接导致内能变化，而不涉及热量。此外，绝热变化并不仅限于理想气体；它也适用于真实气体，尽管在某些条件下行为可能有所不同。在理想情况下，气体的压力和体积可以通过绝热条件相关联，这可以用数学表达式PV^γ = 常数来表示，其中γ（伽马）是比热容比（Cp/Cv）。这个方程表明，在绝热变化过程中，压力（P）和体积（V）的乘积的γ次方保持不变。在实际应用中，绝热变化的概念在各种技术中发挥着重要作用。例如，在发动机设计中，了解气体在绝热条件下的行为可以导致更高效的燃烧过程。同样，在制冷循环中，工程师利用绝热变化原理来优化压缩机的性能，确保冷却系统有效运行。此外，绝热变化的重要性不仅局限于机械系统。在气象学中，这一概念有助于解释气团在大气中上升的过程。当这些气团上升时，由于高处的压力较低，它们会膨胀，导致温度下降，而不与周围环境进行热量交换。这一现象对于理解天气模式和云的形成至关重要。总之，掌握绝热变化的概念对于任何学习热力学或相关领域的人来说都是必不可少的。它提供了关于如何在没有热量交换的情况下发生能量转化的见解，影响理论理解和实际应用。无论是在气体定律、发动机效率还是大气科学的背景下，绝热变化作为一个基础原则，支撑着许多自然过程和技术进步。