1 / 12

Describing Matter

Describing Matter. Chapter 2:2. Terms. Physical Properties ~ a property of matter that can be observed or measured without changing the identity of the matter Physical Change ~ a change that affects one or more physical properties of a substance: many are easy to undo

chiasson
Download Presentation

Describing Matter

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Describing Matter Chapter 2:2

  2. Terms • Physical Properties~ a property of matter that can be observed or measured without changing the identity of the matter • Physical Change~ a change that affects one or more physical properties of a substance: many are easy to undo • Chemical Properties~ a property of matter that describes a substance based on its ability to change into a new substance with different properties • Chemical Change~ a change that occurs when one or more substances are changed into entirely new substances with different properties; cannot be reversed using physical means • Density~ the amount of matter in a given space

  3. The ability to change the substance Physical and Chemical Properties

  4. Physical Properties • Examples • Color • Odor • Volume • State • Density • Density of a substance is always the same at a given pressure and temperature • Density of one substance is usually different than other substances

  5. More Examples • Thermal Conductivity~ the ability to transfer thermal energy from one area to another • Malleability~ the ability to be pounded into thin sheets • Ductility~ the ability to be drawn or pulled into a wire • Solubility~ the ability to dissolve in another substance

  6. Chemical Properties • Examples • Flammability~ able to burn • Reactivity with other substances • Means something can happen • Reactivity with oxygen (rust)

  7. Characteristic Properties • Always the same whether the sample is large or small • Density • Solubility • Reactivity with acids • Used to identify and classify substances

  8. The process of a substance changing Physical and Chemical Change

  9. Physical Change • Does not form a new substance • Examples • Dissolve sugar in water • Sanding a piece of wood • Melting a stick of butter • Usually easy to undo

  10. Chemical Change • Form new substances • Is the actual process in which one substance changes into another substance • Usually cannot be reversed by physical means • Example~ baking a cake • Cake properties are different than those of individual ingredients

  11. Clues to Chemical Changes • Color changes • Fizzing or foaming • Heat • Production of sound, light, or odor

More Related