isothermal change

简明释义

等温变化

英英释义

例句

1.In thermodynamics, an isothermal change refers to a process that occurs at a constant temperature.

在热力学中，等温变化指的是在恒定温度下发生的过程。

2.In a laboratory experiment, we observed an isothermal change by keeping the system in a water bath.

在实验室实验中，我们通过将系统放在水浴中观察到一个等温变化。

3.During an isothermal change, the internal energy of an ideal gas remains constant.

在一次等温变化中，理想气体的内能保持不变。

4.An isothermal change can be represented on a pressure-volume diagram as a horizontal line.

在压力-体积图上，等温变化可以表示为一条水平线。

5.The Carnot cycle includes two isothermal changes that are crucial for its efficiency.

卡诺循环包括两个等温变化，这是其效率的关键。

作文

In the field of thermodynamics, the concept of isothermal change plays a crucial role in understanding how systems behave under constant temperature conditions. An isothermal change is defined as a process that occurs at a constant temperature, meaning that the heat transfer into or out of the system exactly balances the work done by or on the system. This phenomenon can be observed in various natural and engineered processes, such as the operation of heat engines and refrigerators.To further comprehend the significance of isothermal change, it is essential to consider its implications in real-world applications. For example, when a gas expands isothermally, it absorbs heat from its surroundings while doing work on the environment. This process can be described mathematically using the ideal gas law, which states that for an ideal gas, the product of pressure and volume is directly proportional to temperature. During an isothermal change, the temperature remains constant, which means that any increase in volume must result in a corresponding decrease in pressure, maintaining equilibrium.One of the most common examples of isothermal change can be found in the operation of a piston-cylinder assembly. When a gas inside the cylinder is allowed to expand slowly at a constant temperature, the gas molecules gain kinetic energy from the heat source, causing them to move more vigorously. As they push against the piston, the work done by the gas results in a mechanical output, which can be harnessed for various purposes, such as powering an engine or generating electricity.Moreover, isothermal change is not limited to gases; it also applies to liquids and other phases of matter. In the realm of phase transitions, for instance, the melting of ice into water occurs at a constant temperature of 0 degrees Celsius under standard atmospheric pressure. During this isothermal change, the heat absorbed by the ice does not increase its temperature but rather facilitates the transition from solid to liquid.The study of isothermal change is vital for engineers and scientists who design systems that rely on thermal efficiency. Understanding how to maintain constant temperatures during processes can lead to improved performance and reduced energy consumption. For instance, in refrigeration cycles, the refrigerant undergoes isothermal changes as it absorbs heat from the interior of a refrigerator, keeping the contents cool while expelling heat to the outside environment.In conclusion, the concept of isothermal change is fundamental to the study of thermodynamics and has far-reaching implications in both natural phenomena and technological applications. By maintaining constant temperature conditions, systems can achieve efficient energy transfer and work output. Whether in the context of gas expansion, phase transitions, or refrigeration cycles, understanding isothermal change is essential for advancing our knowledge of energy systems and improving their functionality. As we continue to explore the intricacies of thermodynamic processes, the principles underlying isothermal change will undoubtedly remain a focal point of research and innovation.

在热力学领域，等温变化的概念在理解系统在恒定温度条件下的行为方面起着至关重要的作用。等温变化被定义为在恒定温度下发生的过程，这意味着进入或离开系统的热量与系统所做的功恰好平衡。这种现象可以在各种自然和工程过程中观察到，例如热机和冰箱的运行。为了进一步理解等温变化的重要性，有必要考虑其在现实应用中的影响。例如，当气体等温膨胀时，它会从周围环境中吸收热量，同时对环境做功。这个过程可以通过理想气体法则用数学方式描述，该法则指出，对于理想气体，压力和体积的乘积与温度成正比。在等温变化过程中，温度保持不变，这意味着体积的任何增加都必须导致压力的相应减少，从而保持平衡。等温变化最常见的例子之一可以在活塞-气缸组件的操作中找到。当气缸内的气体在恒定温度下缓慢扩展时，气体分子从热源获得动能，导致它们运动得更加剧烈。当它们推动活塞时，气体所做的功产生机械输出，可以用于各种目的，例如驱动发动机或发电。此外，等温变化不仅限于气体；它也适用于液体和其他物质相。在相变领域，例如，在标准大气压下，冰融化为水的过程发生在0摄氏度的恒定温度下。在这个等温变化过程中，冰吸收的热量并没有提高其温度，而是促进了固态向液态的转变。对工程师和科学家来说，研究等温变化对于设计依赖于热效率的系统至关重要。了解如何在过程中维持恒定温度可以提高性能并降低能耗。例如，在制冷循环中，制冷剂经历等温变化，从冰箱内部吸收热量，使内容物保持凉爽，同时将热量排放到外部环境中。总之，等温变化的概念是热力学研究的基础，对自然现象和技术应用具有深远的影响。通过维持恒定的温度条件，系统可以实现有效的能量转移和功输出。无论是在气体膨胀、相变还是制冷循环的背景下，理解等温变化对推进我们对能量系统的知识和提高其功能至关重要。随着我们继续探索热力学过程的复杂性，支撑等温变化的原理无疑将继续成为研究和创新的焦点。