Q:

What does "sublimation" mean in science?

A:

Quick Answer

Sublimation is the scientific process in which solids are changed to gases without passing through the liquid phase. Sublimation occurs when temperatures and pressures are below the triple point. The triple point is the temperature and pressure at which substances can coexist in solid, liquid and vapor forms.

  Know More

Full Answer

An example of sublimation is dry ice changing from a solid into carbon dioxide vapor at room temperature. Sublimation also occurs in nature, especially in high-altitude areas such as Mount Everest. The combination of low air pressure, intense sunlight and cold temperatures causes snow and ice to vaporize without turning into liquid.

Learn more about States of Matter

Related Questions

  • Q:

    What are some exothermic and endothermic phase changes?

    A:

    Sublimation, when a solid transforms into a gas, is an endothermic phrase change, while deposition, when a gas transforms to a solid, is an exothermic phase change. There are a total of six phase changes in matter, and three are endothermic and three are exothermic. An endothermic phase change absorbs heat or energy, while an exothermic phase change releases heat or energy, states the Washington University Department of Chemistry.

    Full Answer >
    Filed Under:
  • Q:

    What causes iodine sublimation?

    A:

    Iodine sublimation is caused by temperatures high enough to break the bonds between the atoms in its crystal lattice in the absence of pressures sufficient to keep them close to one another. At the atmospheric pressures at sea level, these conditions are met at just above room temperature, and thus both iodine sublimation and iodine deposition are readily observed. Iodine is a blue-black solid that sublimes into a purple gas.

    Full Answer >
    Filed Under:
  • Q:

    Which state do most metals exist in at room temperature?

    A:

    Most metals are solids at room temperature as they have high melting points. Mercury is the only metal that occurs in liquid form at this temperature.

    Full Answer >
    Filed Under:
  • Q:

    What are total soluble solids?

    A:

    Total soluble solids are solids that are dissolved within a substance. A common total soluble solid is sugar. The technique of measuring the concentration of total soluble solids is called refractometry, and it is used extensively in the food industry.

    Full Answer >
    Filed Under:

Explore