相关实验视频

Updated: Jul 11, 2026

Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

极地平流层气溶中的转移稳定相

L E Fox, S C Wofsy, D R Worsnop

    Science (New York, N.Y.)
    |January 20, 1995
    PubMed
    概括

    观察了平流层气溶相变,揭示了硫酸 (H(2) SO(4) 和酸 (HNO(3) 的转移性水合物. 这些发现解释了酸的含量.

    更多相关视频

    Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers12:37

    Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers

    Published on: September 4, 2015

    Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets06:26

    Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

    Published on: May 15, 2017

    相关概念视频

    Phase Transitions: Sublimation and Deposition02:33

    Phase Transitions: Sublimation and Deposition

    Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
    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...
    Phase Transitions: Vaporization and Condensation02:39

    Phase Transitions: Vaporization and Condensation

    The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules...
    Molecular Orbital Theory II03:51

    Molecular Orbital Theory II

    Molecular Orbital Energy Diagrams
    States of Matter and Phase Changes00:59

    States of Matter and Phase Changes

    The internal energy of a substance—the total kinetic energy of all its molecules and the potential energy of their associated forces—depends on the strength of the intermolecular forces in the condensed phases and the pressure exerted on the substance. The internal energy of a substance is the highest in the gaseous state, the lowest in the solid state, and intermediate in the liquid state. Phase transitions are caused by changes in physical conditions, such as temperature and pressure, that...
    Phase Diagram01:19

    Phase Diagram

    The phase of a given substance depends on the pressure and temperature. Thus, plots of pressure versus temperature showing the phase in each region provide considerable insights into the thermal properties of substances. Such plots are known as phase diagrams. For instance, in the phase diagram for water (Figure 1), the solid curve boundaries between the phases indicate phase transitions (i.e., temperatures and pressures at which the phases coexist).