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Temperature and Thermal Equilibrium01:11

Temperature and Thermal Equilibrium

6.6K
Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
6.6K
Le Chatelier's Principle: Changing Temperature02:19

Le Chatelier's Principle: Changing Temperature

29.2K
Consistent with the law of mass action, an equilibrium stressed by a change in concentration will shift to re-establish equilibrium without any change in the value of the equilibrium constant, K. When an equilibrium shifts in response to a temperature change, however, it is re-established with a different relative composition that exhibits a different value for the equilibrium constant.
To understand this phenomenon, consider the elementary reaction:
29.2K
Thermodynamic Systems01:06

Thermodynamic Systems

5.0K
A thermodynamic system is a set of objects whose thermodynamic properties are of interest. The system is considered to be embedded in its surroundings or the environment. The system and its environment can exchange heat and do work on each other through a boundary that separates them. However, the immediate surroundings of the system interact with it directly and therefore have a much stronger influence on its behavior and properties.
Consider an example of  tea boiling in a kettle. The...
5.0K
Effects of Temperature on Free Energy02:11

Effects of Temperature on Free Energy

25.1K
The spontaneity of a process depends upon the temperature of the system. Phase transitions, for example, will proceed spontaneously in one direction or the other depending upon the temperature of the substance in question. Likewise, some chemical reactions can also exhibit temperature-dependent spontaneities. To illustrate this concept, the equation relating free energy change to the enthalpy and entropy changes for the process is considered:
25.1K
Body Temperature01:25

Body Temperature

911
The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
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Effect of Temperature Change on Reaction Rate02:28

Effect of Temperature Change on Reaction Rate

4.0K
The Arrhenius equation,
4.0K

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相关实验视频

Updated: Jun 5, 2025

Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature
08:04

Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature

Published on: November 26, 2019

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如何定义活跃系统中的温度?

Lukas Hecht1, Lorenzo Caprini2, Hartmut Löwen3

  • 1Institute of Condensed Matter Physics, Department of Physics, Technical University of Darmstadt, Hochschulstraße 8, D-64289 Darmstadt, Germany.

The Journal of chemical physics
|December 9, 2024
PubMed
概括
此摘要是机器生成的。

在活性系统中定义温度是复杂的. 这项研究揭示了两种不同类型的温度定义,它们显示出令人惊的一致性,甚至远离平衡,有助于在非平衡系统中的测量.

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Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
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Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment

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Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management
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相关实验视频

Last Updated: Jun 5, 2025

Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature
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Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature

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Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
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Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management
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科学领域:

  • 统计力学 统计力学
  • 软物质物理学 软物质物理学
  • 非平衡的热力学.

背景情况:

  • 在平衡热力学中,不同的温度定义是相当的.
  • 活性物质系统本质上是不平衡的,这给温度测量带来了挑战.
  • 现有的在活跃系统中定义温度的方法产生了不同的结果.

研究的目的:

  • 系统地比较活跃系统的各种温度定义.
  • 确定不同温度定义产生一致值的条件.
  • 讨论在活性物质中测量温度的实际含义.

主要方法:

  • 惯性活性布朗粒子的理论分析.
  • 活动系统的计算模拟.
  • 动力,配置,有效和基于病毒的温度的比较.

主要成果:

  • 两个不同的类别的温度定义出现.
  • 第一个类 (动力,配置,速度时刻) 在广泛的参数范围内显示出强烈的一致性.
  • 第二类 (有效性,病毒性,斯托克斯-爱因斯坦,限制) 也显示了内部协议,但与第一类有很大的不同.

结论:

  • 尽管处于不平衡状态,但活跃系统中的某些温度定义表现出了显著的趋同.
  • 这些发现为在活性物质研究中选择适当的温度测量提供了框架.
  • 了解这些温度级别对于准确描述活跃系统至关重要.