Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Entropy02:39

Entropy

36.6K
Salt particles that have dissolved in water never spontaneously come back together in solution to reform solid particles. Moreover, a gas that has expanded in a vacuum remains dispersed and never spontaneously reassembles. The unidirectional nature of these phenomena is the result of a thermodynamic state function called entropy (S). Entropy is the measure of the extent to which the energy is dispersed throughout a system, or in other words, it is proportional to the degree of disorder of a...
36.6K
Entropy01:18

Entropy

3.7K
The first law of thermodynamics is quantitatively formulated via an equation relating the internal energy of a system, the heat exchanged by it, and the work done on it. A quantitative formulation of the second law of thermodynamics leads to defining a state function, the entropy.
When an ideal gas expands isothermally, the disorder in the gas increases. From the molecular perspective, the gas molecules have more volume to move around in.
Consider an infinitesimal step in the expansion, which...
3.7K
Third Law of Thermodynamics02:38

Third Law of Thermodynamics

22.2K
A pure, perfectly crystalline solid possessing no kinetic energy (that is, at a temperature of absolute zero, 0 K) may be described by a single microstate, as its purity, perfect crystallinity,and complete lack of motion means there is but one possible location for each identical atom or molecule comprising the crystal (W = 1). According to the Boltzmann equation, the entropy of this system is zero.
22.2K
Entropy and Solvation02:05

Entropy and Solvation

8.6K
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...
8.6K
Standard Entropy Change for a Reaction03:00

Standard Entropy Change for a Reaction

25.2K
Entropy is a state function, so the standard entropy change for a chemical reaction (ΔS°rxn) can be calculated from the difference in standard entropy between the products and the reactants.
25.2K
Second Law of Thermodynamics02:49

Second Law of Thermodynamics

27.2K
In the quest to identify a property that may reliably predict the spontaneity of a process, a promising candidate has been identified: entropy. Processes that involve an increase in entropy of the system (ΔS > 0) are very often spontaneous; however, examples to the contrary are plentiful. By expanding consideration of entropy changes to include the surroundings, a significant conclusion regarding the relation between this property and spontaneity may be reached. In thermodynamic models, the...
27.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Unraveling internal friction in a coarse-grained protein model.

The Journal of chemical physics·2025
Same author

Statistical mechanics of the GENERIC framework under external forcing.

The Journal of chemical physics·2023
Same author

Non-local viscosity from the Green-Kubo formula.

The Journal of chemical physics·2020
Same author

Discrete hydrodynamics near solid walls: Non-Markovian effects and the slip boundary condition.

Physical review. E·2020
Same author

Microscopic Slip Boundary Conditions in Unsteady Fluid Flows.

Physical review letters·2020
Same author

Discrete hydrodynamics near solid planar walls.

Physical review. E·2019

Related Experiment Video

Updated: Feb 18, 2026

Unraveling Entropic Rate Acceleration Induced by Solvent Dynamics in Membrane Enzymes
09:42

Unraveling Entropic Rate Acceleration Induced by Solvent Dynamics in Membrane Enzymes

Published on: January 16, 2016

9.4K

The entropy of a complex molecule.

Gérôme Faure1, Rafael Delgado-Buscalioni2, Pep Español3

  • 1CEA, DAM, DIF, F-91297 Arpajon, France.

The Journal of Chemical Physics
|November 23, 2017
PubMed
Summary

We found that the entropy of thermal blobs, representing star polymers, can be accurately calculated by summing the entropy of individual molecules. This simplifies understanding complex polymer systems.

More Related Videos

Differential Scanning Calorimetry — A Method for Assessing the Thermal Stability and Conformation of Protein Antigen
08:13

Differential Scanning Calorimetry — A Method for Assessing the Thermal Stability and Conformation of Protein Antigen

Published on: March 4, 2017

40.4K
Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
08:04

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

Published on: May 27, 2020

9.0K

Related Experiment Videos

Last Updated: Feb 18, 2026

Unraveling Entropic Rate Acceleration Induced by Solvent Dynamics in Membrane Enzymes
09:42

Unraveling Entropic Rate Acceleration Induced by Solvent Dynamics in Membrane Enzymes

Published on: January 16, 2016

9.4K
Differential Scanning Calorimetry — A Method for Assessing the Thermal Stability and Conformation of Protein Antigen
08:13

Differential Scanning Calorimetry — A Method for Assessing the Thermal Stability and Conformation of Protein Antigen

Published on: March 4, 2017

40.4K
Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
08:04

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

Published on: May 27, 2020

9.0K

Area of Science:

  • Polymer Physics
  • Statistical Mechanics
  • Computational Chemistry

Background:

  • Entropy is crucial for coarse-graining theories, determining equilibrium distributions.
  • Star polymers in a melt present complex systems for coarse-grained descriptions.

Purpose of the Study:

  • To investigate the equilibrium probability distribution of thermal blobs for star polymers.
  • To determine if molecular-level entropy accurately represents coarse-grained entropy.

Main Methods:

  • Molecular dynamics simulations were employed.
  • The equilibrium probability distribution of thermal blobs was analyzed.
  • Thermodynamic entropy of individual star polymer molecules was calculated.

Main Results:

  • The entropy of thermal blobs closely approximates the sum of individual molecule entropies.
  • A single molecule's entropy depends solely on its intrinsic energy, excluding inter-molecular interactions.

Conclusions:

  • Coarse-grained entropy of star polymer melts can be simplified by considering isolated molecules.
  • This finding offers a more tractable approach to understanding polymer system thermodynamics.