first law of thermodynamics

简明释义

热力学第一定律

英英释义

例句

1.Engine efficiency can be explained by the first law of thermodynamics (热力学第一定律) since it relates energy input to output.

发动机效率可以通过热力学第一定律来解释，因为它将能量输入与输出联系起来。

2.The conservation of energy principle is a direct consequence of the first law of thermodynamics (热力学第一定律).

能量守恒原理是热力学第一定律的直接结果。

3.Understanding the first law of thermodynamics (热力学第一定律) is crucial for designing efficient thermal systems.

理解热力学第一定律对于设计高效的热系统至关重要。

4.When analyzing a refrigerator, the first law of thermodynamics (热力学第一定律) helps us understand how energy is transferred.

在分析冰箱时，热力学第一定律帮助我们理解能量是如何转移的。

5.In a closed system, the heat added equals the work done plus the change in internal energy, illustrating the first law of thermodynamics (热力学第一定律).

在一个封闭系统中，加入的热量等于所做的功加上内能的变化，这说明了热力学第一定律。

作文

The first law of thermodynamics is a fundamental principle in the field of physics that describes the conservation of energy within a closed system. It states that energy cannot be created or destroyed; it can only be transformed from one form to another. This law is essential for understanding how energy flows and changes form in various processes, such as mechanical work, heat transfer, and chemical reactions.To better understand the first law of thermodynamics, let’s consider an everyday example: a car engine. When fuel is burned in the engine, chemical energy is released, which is then converted into thermal energy. This thermal energy causes the engine components to move, converting it into mechanical energy that propels the vehicle forward. Throughout this process, the total energy remains constant; it merely changes forms. This illustrates the essence of the first law of thermodynamics.In practical applications, this law has significant implications. For instance, in designing efficient heating systems, engineers must consider how to minimize energy losses. By understanding that energy can only change forms, they can devise methods to retain as much thermal energy as possible, ensuring that the system operates efficiently. Similarly, in renewable energy technologies, such as solar panels, the first law of thermodynamics plays a crucial role in converting sunlight into usable electrical energy.Moreover, the first law of thermodynamics is not limited to mechanical systems; it also applies to biological systems. For example, when humans consume food, the body converts the chemical energy stored in nutrients into other forms of energy required for bodily functions, such as movement and growth. The conservation of energy is vital for maintaining life, as organisms rely on transforming energy from their environment to survive.Understanding the first law of thermodynamics also helps in addressing environmental challenges. As society seeks to reduce its carbon footprint, recognizing how energy is transformed and conserved can lead to more sustainable practices. For instance, improving energy efficiency in homes and industries directly relates to applying the first law of thermodynamics. By using less energy to achieve the same results, we can reduce waste and promote sustainability.In conclusion, the first law of thermodynamics is a cornerstone of energy science that provides insight into how energy behaves in various systems. Its principles are applicable across multiple fields, including engineering, biology, and environmental science. By grasping the significance of this law, we can better appreciate the intricate balance of energy transformation in our world and strive towards more efficient and sustainable practices. Understanding the first law of thermodynamics not only enriches our knowledge of physical laws but also empowers us to make informed decisions about energy use and conservation in our daily lives.

热力学第一定律是物理学领域的一个基本原理，描述了封闭系统内能量的守恒。它指出，能量不能被创造或摧毁；它只能从一种形式转变为另一种形式。这个定律对于理解能量在各种过程中如何流动和变化形式至关重要，例如机械功、热传递和化学反应。为了更好地理解热力学第一定律，让我们考虑一个日常例子：汽车发动机。当燃料在发动机中燃烧时，释放出化学能，然后转化为热能。这种热能使发动机部件运动，将其转化为推动车辆前进的机械能。在这个过程中，总能量保持不变；它只是形式发生了变化。这说明了热力学第一定律的本质。在实际应用中，这一定律具有重要意义。例如，在设计高效的供暖系统时，工程师必须考虑如何最小化能量损失。通过理解能量只能改变形式，他们可以设计出尽可能保留热能的方法，确保系统高效运行。同样，在可再生能源技术，如太阳能电池板中，热力学第一定律在将阳光转化为可用的电能时也起着至关重要的作用。此外，热力学第一定律不仅限于机械系统；它同样适用于生物系统。例如，当人类摄入食物时，身体将营养物质中储存的化学能转化为身体功能所需的其他形式的能量，如运动和生长。能量的守恒对维持生命至关重要，因为生物体依赖于将来自环境的能量转化为生存所需的能量。理解热力学第一定律还有助于应对环境挑战。随着社会寻求减少碳足迹，认识到能量是如何转化和守恒的，可以导致更可持续的实践。例如，提高家庭和工业的能效与应用热力学第一定律直接相关。通过使用更少的能量来实现相同的结果，我们可以减少浪费，促进可持续性。总之，热力学第一定律是能源科学的基石，为我们提供了关于能量在各种系统中行为的见解。其原理适用于多个领域，包括工程、生物学和环境科学。通过掌握这一法则的重要性，我们可以更好地欣赏我们世界中能量转化的微妙平衡，并努力实现更高效和可持续的实践。理解热力学第一定律不仅丰富了我们对物理法则的认识，而且使我们能够就日常生活中的能量使用和保护做出明智的决策。