CreolaBencivenga220
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Which process represents a chemical change?(1) melting of ice(2) corrosion of copper(3) evaporation of water(4) crystallization of sugar

Sagot :

transitionstate

Answer:

             Corrosion of Copper is a chemical change.

Explanation:

                   Copper like Iron when come in contact with moisture and oxygen oxidized and corrodes according to following equation,

                                             4 Cu  +  O₂    →   2 Cu₂O

This corrosion results in lost of conductivity, strength and luster of copper. As in this reaction two substances i.e Cu and O₂ are reacting to produce a completely new substance i.e. Cu₂O hence, it is declared as chemical change.

mariejoepagaduan

The process which represents a chemical change is (2) corrosion of copper.

FURTHER EXPLANATION

Matter may undergo two types of changes: physical or chemical change.

Physical change involves changes in appearance, size, and other physical properties of a substance. There is no change in the composition or identity of the substance. Examples of physical changes are changes of state and change in size.

Chemical changes are changes wherein the composition or identity of the substance is altered. The properties of the substance changes. This involves formation of a new substance due to the rearrangement of atoms. Examples of chemical change are burning and rotting.

  1. Melting of Ice is a physical change. It is only a state change from solid to liquid.
  2. Corrosion of copper is a chemical change. A new substance forms when copper is corroded and there is a change in the property of the substance. Copper is a conductor but copper oxide is not.
  3. Evaporation of water is a physical change. It is a state change from liquid to vapor.
  4. Crystallization of sugar is a physical change. The composition of sugar remains the same and no new chemical bonds are formed.

LEARN MORE

  1. chemical and nuclear reaction https://brainly.com/question/9566647
  2. rusting https://brainly.com/question/973790

Keywords: physical change, chemical change

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