06 Notes - Phys-Chem Properties and Changes

06 Notes - Phys-Chem Properties and Changes - Pluchino...

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Pluchino – Regents Chemistry Matter and Measurement – 06 Physical/Chemical Properties & Changes Aim: What are physical and chemical properties and changes? Do Now: Observe the “reactions” taking place and break them up into 2 categories (you choose how to divide them up). Physical Change: change in matter that does not alter the identity of the substance Physical change: H 2 O ( l ) H 2 O (g) Phase changes are physical changes! Phase Change Terminology solid liquid liquid solid liquid gas gas liquid solid gas gas solid Chemical Change: change in matter that does alter the identity of the substance Chemical change: H 2 O (g) H 2 (g) + O 2 (g) Generally there are 3 signs that a chemical change has occurred: Color change Production of a precipitate (solid) Production of a gas (bubbles) Practice: Classify the following as chemical or physical changes. a. Ice melts
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06 Notes - Phys-Chem Properties and Changes - Pluchino...

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