1 / 23

Needed this week

Needed this week. Balloons One and two liter bottles Cotton gloves (to handle and protect from dry ice?). Chapter 13, States of Matter. Four states of matter you need to know: Solid Liquid Gas Plasma. Determining the states of matter.

minh
Download Presentation

Needed this week

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. Needed this week • Balloons • One and two liter bottles • Cotton gloves (to handle and protect from dry ice?)

  2. Chapter 13, States of Matter • Four states of matter you need to know: • Solid • Liquid • Gas • Plasma

  3. Determining the states of matter • The amount of kinetic energy a substance contains determines its physical state (solid, gas, liquid). The more energy it has, the “looser” it is bound

  4. States of Matter

  5. Adding Kinetic Energy

  6. Notice • Did you notice that the Kinetic energy was added in the form of heat?

  7. Solids • Solids stick together and stay in the same position next to each other (Like a class in which all students are seated)

  8. Liquids • In a liquid, the particles touch each other but can move freely, like students in a crowded hallway.

  9. Gases • In a gas, the molecules are not in regular contact with each other and bounce off when they hit one another (picture sixth graders in gym)

  10. Gas Pressure • Gas pressure is the results of trillions of molecules banging against each other. The pressure is exerted in all directions at once. This is how a balloon or a tire stays inflated.

  11. Gas Pressure

  12. Atmospheric pressure • Atmospheric pressure is the pull of gravity on all the gas above us in the atmosphere. • A Barometer measures this pressure • At sea level, atmospheric pressure is 760 mm of mercury, on Mt. Everest, it is 253 mm of mercury

  13. Barometer

  14. Measuring pressure • Atmospheres (atm) • mm of Mercury (mm Hg) • Pascals (Pa) • Kilopascals (because pascals are tiny) (kPa)

  15. Note = Dumb ole’ TV and radio meteorologists use inches of mercury rather than mm or kPa!!! One inch is 25.4 mm 760 mm = 29.92 inches

  16. Converting • 1atm equals • 760 mm Hg equals • 101.3 kPa • 1atm = 760 mm Hg = 101.3 kPa

  17. Swapping units • 450 kPa X 760 mm Hg = 3400 mm Hg • 101.3 kPa • Note that 760 mm Hg and 101.3 kPa are the same pressure, so you multiply by one to convert

  18. Standards • STP = Standard Temperature and Pressure • 273 K (0° Celsius) • standard pressure is 1 atm • At STP, one mole of gas occupies 22.4 L

  19. Temperature and Kinetic Energy • Temperature is the Average Kinetic Energy in a substance

  20. Should you need more and better explanations: • http://phet.colorado.edu/en/simulation/states-of-matter (needs java)(animation) • http://www.chemtutor.com/sta.htm (text) • http://www.footprints-science.co.uk/states.htm (animation and text) • http://www.youtube.com/watch?v=V9WYweBA6vA (music Video)

  21. More links • http://www.youtube.com/watch?v=cBBmdqti_Kg (student project video) • http://www.youtube.com/watch?v=vDZhUkp30tE (teacher done music video)

  22. Conclusions • Answers questions 3-5 on page 389. Click the sounds icon for my answers

More Related