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.

  • Is a change of state of matter a physical or chemical change?

  • Is a change of the state (or phase) of matter a physical or chemical change? A phase change does not involve changing the identity or makeup of that species. When you take solid ice and melt it (add enough energy to it) it changes to water, which is now a liquid.

  • 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 phase change of ice?

  • A phase change does not involve changing the identity or makeup of that species. When you take solid ice and melt it (add enough energy to it) it changes to water, which is now a liquid. It’s still water because if you could see at the atomic level, you would still see H 2O present. The arrangement is just a little different now.

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