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相关概念视频

Thermodynamic Potentials01:26

Thermodynamic Potentials

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Thermodynamic potentials are state functions that are extremely useful in analyzing a thermodynamic system. They have dimensions of energy. The four important thermodynamic potentials are internal energy, enthalpy, Helmholtz free energy, and Gibbs free energy. These thermodynamic potentials can be expressed using two of the following variables: pressure, volume, temperature, and entropy. These two variables are expressed as the rate of change of the thermodynamic potential with respect to other...
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Entropy and Solvation02:05

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The process of surrounding a solute with solvent is called solvation. It involves evenly distributing the solute within the solvent. The rule of thumb for determining a solvent for a given compound is that like dissolves like. A good solvent has molecular characteristics similar to those of the compound to be dissolved. For example, polar solutions dissolve polar solutes, and apolar solvents dissolve apolar solutes. A polar solvent is a solvent that has a high dielectric constant (ϵ...
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Calculating Standard Free Energy Changes02:49

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The free energy change for a reaction that occurs under the standard conditions of 1 bar pressure and at 298 K is called the standard free energy change. Since free energy is a state function, its value depends only on the conditions of the initial and final states of the system. A convenient and common approach to the calculation of free energy changes for physical and chemical reactions is by use of widely available compilations of standard state thermodynamic data. One method involves the...
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Potential energy or potential function plays an essential role in determining the stability of a mechanical system. If a system is subjected to both gravitational and elastic forces, the potential function of the system can be expressed as the algebraic sum of gravitational and elastic potential energy. If the system is in equilibrium and is displaced by a small amount, then the work done on the system equals the negative of the change in the system's potential energy from the initial to the...
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Gibbs Free Energy02:39

Gibbs Free Energy

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One of the challenges of using the second law of thermodynamics to determine if a process is spontaneous is that it requires measurements of the entropy change for the system and the entropy change for the surroundings. An alternative approach involving a new thermodynamic property defined in terms of system properties only was introduced in the late nineteenth century by American mathematician Josiah Willard Gibbs. This new property is called the Gibbs free energy (G) (or simply the free...
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VSEPR Theory for Determination of Electron Pair Geometries
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Rapid in-silico Battery Electrolyte Electrochemical Reaction Generation using 3T-VASP Multi-Scale Energy Minimization
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具有神经网络潜力的建筑独立的绝对溶解自由能量计算.

Anna Katharina Picha1,2, Sara Tkaczyk3,4, Thierry Langer3

  • 1University of Vienna, Faculty of Chemistry, Institute of Computational Biological Chemistry, 1090 Vienna, Austria.

The journal of physical chemistry letters
|November 11, 2025
PubMed
概括
此摘要是机器生成的。

我们介绍了一种使用神经网络潜力 (NNP) 的化学自由能量模拟 (FES) 中逐渐解原子和分子的新方法. 这种方法与各种NNP架构兼容,允许更准确的FES计算.

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科学领域:

  • 计算化学计算化学
  • 材料科学 材料科学 材料科学

背景情况:

  • 化学自由能模拟 (FES) 对于预测分子性质至关重要.
  • 传统的FES方法依赖于力场,但神经网络潜力 (NNP) 提供了更高的准确性.
  • 在FES的一个关键挑战是原子和分子的逐渐脱.

研究的目的:

  • 开发一种使用NNP在FES中的原子和分子脱的新方法.
  • 确保该方法与各种NNP架构的兼容性.
  • 为了验证该方法在FES中的准确性和适用性.

主要方法:

  • 开发了一种技术,通过操纵NNP描述系统中的邻居列表来逐渐解原子/分子.
  • 证明了这种邻居列表操纵与在力场FES中使用的软核潜力的等价性.
  • 通过循环闭合测试和溶解自由能量的计算验证了该方法.

主要成果:

  • 成功实施了一种在基于NNP的FES中逐步脱的方法.
  • 显示邻居列表操纵有效地模仿软核心潜力.
  • 使用MACE-OFF23 ((S/M) NNP. 实现了准确的溶解自由能量.

结论:

  • 拟议的方法为基于NNP的FES提供了一种多功能方法.
  • 这种技术对特定的NNP架构不可知,增强了其广泛的适用性.
  • 该方法允许准确的自由能量计算,准确度可能更高的NNP.