are phase changes chemical changes

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  • What is phase change in chemistry?

  • Updated February 04, 2019. Definition: A phase change is a change in the state of matter of a sample. A phase change is an example of a physical change. Also Known As: phase transition.

  • When does a chemical change occur?

  • A chemical change occurs when the composition of a substance is changed, which requires the breaking and forming of chemical bonds during a chemical reaction. This results in the rearranging of atoms in substances to form the products of a chemical reaction, which are brand new molecules that cannot be easily reverted back to their original state.

  • What is the difference between physical and chemical changes?

  • Physical changes in matter are reversible: An ice cube can melt into liquid water, and then the liquid water can be frozen back into an ice cube. Chemical changes, on the other hand, are not reversible: A log burned in a fire turns to ashes, but the ashes cannot be changed back into a log. What Is a Physical Change?

  • What type of changes can happen to matter?

  • Matter is capable of undergoing changes, which are classified as either physical or chemical. Physical changes in matter are reversible: An ice cube can melt into liquid water, and then the liquid water can be frozen back into an ice cube.

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