Q:

What is road tar made of?

A:

Quick Answer

Road tar is made from a mixture of hydrocarbons produced by processing crude oil or natural gas. Bitumen is the remnant of crude oil after the gasoline, kerosene, diesel oil and other fuels have been removed.

Continue Reading

Full Answer

Bitumen is solid at low temperatures, but turns into a liquid at high temperatures. Tar is usually applied while hot so that it flows down into road cracks easily. Once cooled it turns into a semisolid substance. On days with a high ambient temperature tar becomes soft, and can become loose and pull away from the roads. This leads to the oil contained inside the tar being sprayed onto the lower panels of vehicles passing over them.

Learn more about Chemistry

Related Questions

  • Q:

    How is propane made?

    A:

    Propane is separated from crude oil during the refining process and extracted from natural gas at a gas processing plant. It is considered a fossil fuel because it was formed from the remains of sea animals and plants. When living organisms die and sink to the bottom of the sea, sand and silt cover them, subjecting the remains to high pressure and heat, which change the chemical makeup.

    Full Answer >
    Filed Under:
  • Q:

    What are some examples of petrochemicals?

    A:

    Petrochemicals are organic chemicals made from crude oil and natural gas for use in industrial processes. Examples of primary petrochemicals include methanol, ethylene, propylene, butadiene, benzene, toluene and xylene. Roughly five percent of the world's annual oil supply is utilized to make petrochemicals. These organic substances are used to make plastics, medicines, furniture, appliances, solar panels, PVC pipes, bulletproof vests, consumer electronics, wind turbines and automobile parts.

    Full Answer >
    Filed Under:
  • Q:

    Why does baking soda and vinegar erupt?

    A:

    The mixture of baking soda and vinegar erupts because the baking soda and vinegar react to form carbon dioxide gas inside of the mixture. The carbon dioxide rises to the surface of the baking soda and vinegar mixture in the same way that carbon dioxide rises in carbonated beverages, such as soda.

    Full Answer >
    Filed Under:
  • Q:

    How does gas chromatography work?

    A:

    Gas chromatography works by taking a mixture of gases and moving it through liquid, solid or gas states in order to separate the gases. This process separates the mixture into its different components, which are then processed through a device such as a mass spectrometer, which describes them.

    Full Answer >
    Filed Under:

Explore