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“What’s the Matter?”

“What’s the Matter?”. Chem 332 – O’Dette. Properties. Physical Property – determined without changing the identity of a substance EX: color, freezing/melting point, shape, density, hardness With a partner, describe the physical properties of the object below?. properties.

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“What’s the Matter?”

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  1. “What’s the Matter?” Chem 332 – O’Dette

  2. Properties • Physical Property – determined without changing the identity of a substance • EX: color, freezing/melting point, shape, density, hardness • With a partner, describe the physical properties of the object below?

  3. properties • Chemical Property – can only be tested by doing a chemical reaction • EX: flammability, acidity/basicity, reactivity

  4. Changes • Physical Change – original substance still exists, just changes form; can be reversible or irreversible • EX: Ice Melting • EX: Hair Cut Reversible Irreversible

  5. changes • Chemical Change – when a new substance is produced • Signs of a Chemical Change – DEMOS!!! • Change in color • Formation of a solid from two liquids (precipitate) • Heat produced or heat absorbed • Formation of a gas or bubbles

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