the properties of matter n.
Skip this Video
Loading SlideShow in 5 Seconds..
The Properties of Matter PowerPoint Presentation
Download Presentation
The Properties of Matter

Loading in 2 Seconds...

play fullscreen
1 / 29

The Properties of Matter - PowerPoint PPT Presentation

Download Presentation
The Properties of 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. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. The Properties of Matter Chapter 2: Lecture 2

  2. V is for Volume • Volume is the amount of space something takes up • Whether it’s a speck of dust or Jupiter, all matter takes up space

  3. Measuring the volume of… Liquids: • Graduated cylinder • Displacement method • Measured in liters (L) & milliliters (mL) Solids: • Length x width x height Gases: • Since a gas expands to fill its container, if you know the volume of the container, you know the volume of the gas.

  4. 4. Reading the Meniscus Reading the Meniscus

  5. 5. Displacement Method for Volume Volume Displacement

  6. Density - The mass of a substance divided by its volume • Mass is the amount of matter in an object • Volume is the amount of space an object occupies

  7. 5. Eureka!! Volume & Density Eureka!Volume Density

  8. You try it!

  9. How can you describe things if you didn't know what they were? • Describing objects by using • size • shape • color • texture

  10. Properties • Everyone used similar descriptions • Some of the propertiesyou listed about your objectwere: size, weight and mass, shape, odor, sound • After opening your bag, you were able to list even more properties such as color, texture, etc.

  11. Properties of Matter • Apropertydescribes how an object looks, feels, or acts. • The objects shown here have different kinds of properties:

  12. Physical properties • Physical properties can be observed or measured without changing the identity of the matter • These are properties you notice when using one of your five senses: • Feel - mass, volume, texture • Sight - color • Hear • Smell • Taste

  13. Physical Properties • Color • Odor • Luster - How shiny a substance is • Malleability - The ability of a substance to be beaten into thin sheets • Ductility - The ability of a substance to be hammered thin or stretched into wire without breaking

  14. Conductivity - The ability of a substance to allow the flow of energy or electricity • Hardness - How easily a substance can be scratched • Melting/Freezing Point - The temperature at which the solid and liquid phases of a substance are in equilibrium at atmospheric pressure • Boiling Point - The temperature at which the vapor pressure of a liquid is equal to the pressure on the liquid (generally atmospheric pressure)

  15. More Physical Properties Density is a very important property. • It is the amount of matter in a given volume. • Density = Mass / Volume

  16. Properties are constantly changing... • Matter is constantly changing. • Ice in your soda melts, glass breaks, paper is ripped. • When ice in your soda melts where does it go? • What does it become?

  17. Physical vs. Chemical • Physical properties: are observed without changing the identity of the substance • Chemical properties: are observed only when the identity of the substance is changed • How do you know if a change is chemical or physical? • If it CHanges, it’s CHemical

  18. Chemical properties • A common chemical property is reactivity– the tendency of a substance to undergo a chemical reaction, either by itself or with other materials, and to release energy • Reactive to oxygen (tarnishing of copper) • Reactive to air (burning wood) • Reactive to water (dissolving salt in water) • Notice that chemical properties aren’t EASY to observe, unlike physical properties.

  19. Physical Changes: • Changes in matter that do not alter the identity of the matter itself.

  20. Physical Changes • Changes that do NOT change the identity of the substance. • You may or may not be able to undo a physical change.

  21. If you remember, ice is water in the solid state. • When you drop the ice cube into the liquid, it begins to melt because the temperature is higher than that of the ice cube. • It's like putting a snowman on your front lawn in July. • The ice cube becomes liquid water. • This is an example of a physical change. • The solid water turned to liquid water.

  22. Chemical Changes • Chemical changes do alter the identity of a substance • In other words, a chemical change is when something changes into an entirely different substance • For example: • Iron rusting • Wood burning • Copper turning to brass • Baking a cake • spoiled milk

  23. Chemical properties- • These are properties that can only be observed by changing the identity of the substance. • A piece of paper burns and turns to a black substance. • After the flame goes out you can no longer burn the new substance. • The chemical properties have been changed.

  24. Milk needs to be in the refrigerator or else it will go bad • The milk gets a sour odor and becomes lumpy. This is a chemical change • Unlike physical changes, you cannot reverse chemical changes • You cannot make milk unspoiled

  25. The Take Home Message • State changes, like melting, freezing, boiling, are all PHYSICAL change. • The substance remains the same substance, it just changes what STATE or form it is in • CHEMICAL changes rearrange the atoms creating a new substance

  26. Chemical vs Physical Change •