What Are 2 Physical Changes in Chemistry? Examples of Melting and Dissolution

Learn about two key physical changes in chemistry: melting and dissolution, and how they differ from chemical changes.

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Two physical changes in chemistry are melting and dissolution. Melting occurs when a solid turns into a liquid, such as ice melting into water. Dissolution happens when a solute dissolves in a solvent, like sugar dissolving in water. Both changes are physical because they do not alter the substance's chemical structure, only its physical state.

FAQs & Answers

  1. What is a physical change in chemistry? A physical change in chemistry is a change where the form or appearance of a substance alters but its chemical composition remains the same.
  2. How does melting qualify as a physical change? Melting is a physical change because it changes a solid into a liquid without altering the substance's chemical structure.
  3. What happens during dissolution in physical changes? During dissolution, a solute dissolves in a solvent, changing physical state but not the chemical identity of the solute.

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