Is rusting a chemical change?
Credit: Dave Shafer Aurora Getty Images
Q:

Is rusting a chemical change?

A:

Quick Answer

The formation of rust represents a chemical change. When a chemical change occurs, the substance or substances present at the beginning are no longer present at the end of the change. Once a chemical change occurs, it theoretically cannot be undone.

  Know More

Full Answer

Conversely, when a physical change occurs, the material that is the subject of the physical alteration is unchanged. A physical change theoretically is capable of being undone. One example of this is melting an ice cube; once the ice cube melts, the material (water) remains the same and can be refrozen back into a solid. The rust that forms as the result of a chemical change, on the other hand, is a different type of material than the original object that underwent the transformation. A change has occurred at the atomic level that cannot be undone.

Learn more about Chemistry
Sources:

Related Questions

  • Q:

    Why is a burning candle a chemical change?

    A:

    A burning candle is an example of a chemical change because the paraffin wax, which is a hydrocarbon, undergoes a chemical reaction with oxygen to form water and carbon dioxide gas. Because the chemical structure of the paraffin has been altered, this is a chemical change.

    Full Answer >
    Filed Under:
  • Q:

    Is toasting bread a chemical change?

    A:

    Toasting bread is a chemical change since changing the bread to toast cannot be reversed. A chemical change affects the very essence of the object since the substances available at the beginning of the process are no longer available after completion of the process.

    Full Answer >
    Filed Under:
  • Q:

    What happens during a chemical change?

    A:

    Alterations to the electron-based ionic or covalent bonds between ions or atoms happen during a chemical change. Such changes result in one or more new substances with different physical and chemical properties. This type of change stands in contrast to physical changes which, despite sometimes closely resembling chemical changes, only produce a change in physical properties.

    Full Answer >
    Filed Under:
  • Q:

    Is frying an egg a chemical change?

    A:

    Frying an egg involves a chemical change. The heat in the frying process gives energy to the egg's molecules and brings about a permanent change in the substance.

    Full Answer >
    Filed Under:

Explore