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Related Concept Videos

Freezing Point Depression and Boiling Point Elevation01:24

Freezing Point Depression and Boiling Point Elevation

When a non-volatile solute is added to a pure solvent, it results in the lowering of the freezing point of the solvent. This phenomenon is called freezing point depression. The extent to which the freezing point is lowered depends on the molality of the solute -the number of moles of solute per kilogram of solvent and the cryoscopic constant of the solvent.From the plot of chemical potential, μ, against temperature, it is evident that the μ of both solid and liquid solvents decrease with...
Freezing Point Depression and Boiling Point Elevation03:12

Freezing Point Depression and Boiling Point Elevation

Boiling Point Elevation
The boiling point of a liquid is the temperature at which its vapor pressure is equal to ambient atmospheric pressure. Since the vapor pressure of a solution is lowered due to the presence of nonvolatile solutes, it stands to reason that the solution’s boiling point will subsequently be increased. Vapor pressure increases with temperature, and so a solution will require a higher temperature than will pure solvent to achieve any given vapor pressure, including one...
Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
Thermodynamic Potentials01:26

Thermodynamic Potentials

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...
Electrolytes: van't Hoff Factor03:08

Electrolytes: van't Hoff Factor

Colligative Properties of ElectrolytesThe colligative properties of a solution depend only on the number, not on the identity, of solute species dissolved. The concentration terms in the equations for various colligative properties (freezing point depression, boiling point elevation, osmotic pressure) pertain to all solute species present in the solution. Nonelectrolytes dissolve physically without dissociation or any other accompanying process. Each molecule that dissolves yields one dissolved...

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LabVIEW-operated Novel Nanoliter Osmometer for Ice Binding Protein Investigations
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Published on: February 4, 2013

Predicting freezing for some repulsive potentials.

S A Khrapak1, G E Morfill

  • 1Max-Planck-Institut für extraterrestrische Physik, D-85741 Garching, Germany.

Physical Review Letters
|April 7, 2010
PubMed
Summary
This summary is machine-generated.

A new method predicts freezing transitions in repulsive particle systems using universal freezing curves. This approach is demonstrated for complex plasmas and applicable to similar interactions.

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Area of Science:

  • Physics
  • Physical Chemistry

Background:

  • Predicting phase transitions, specifically fluid-solid transitions, is crucial in various physical systems.
  • Systems with purely repulsive potentials present unique challenges for phase transition prediction.

Purpose of the Study:

  • To develop a simple and approximate method for predicting the freezing phase transition.
  • To demonstrate the applicability of this method to complex plasmas.

Main Methods:

  • Utilizing the observed universality of freezing curves for Yukawa and inverse-power-law interactions.
  • Applying the method to construct an exemplary phase diagram for complex plasmas.

Main Results:

  • A straightforward method for approximating freezing transitions in repulsive systems was established.
  • The method successfully generated a phase diagram for complex plasmas, validating its utility.

Conclusions:

  • The proposed method offers a broadly applicable tool for predicting freezing transitions in systems with repulsive interactions.
  • This universality-based approach can be extended to other substances exhibiting similar interaction properties.