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Matter and Particles

Matter and Particles. 1. What are some of the gases you know about or have heard about. 2. How would you define gas? 3. Everything is made of elements. What elements could be in the gas that forms when sodium bicarbonate (NaHCO 3 ) and citric acid (C 6 H 8 O 7 ) react?. Matter and Particles.

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Matter and Particles

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  1. Matter and Particles 1. What are some of the gases you know about or have heard about. 2. How would you define gas? 3. Everything is made of elements. What elements could be in the gas that forms when sodium bicarbonate (NaHCO3) and citric acid (C6H8O7) react?

  2. Matter and Particles Chemical Equation • NaHCO3 + C6H8O7 C6H5Na3O7 + CO2 + H2O (sodium bicarbonate) + (citric acid)  (sodium citrate) + (carbon dioxide) + (water)

  3. Matter and Particles • What is air? Air is a gas or a mixture of gases. Air is everywhere all over the earth. Air is a resource for life. Air is matter.

  4. Air/Mass Demo • How do you think we could prove that air has mass.

  5. Properties of Air with Syringes Syringe Uses • 2 syringe system • 1 syringe system • Work with or without air in syringe

  6. Properties of Air with Syringes End of Day 1

  7. Properties of Air with Syringes • What did we learn about air using a two-syringe system? • What did we learn about air with a syringe system that was clamped shut?

  8. Properties of Air with Syringes • Why couldn’t the plunger be pushed all the way down in a closed system? Air is in the syringe. Air is matter. Air takes up space, The plunger can’t be in the same space as air. Air pushed back. • Does air take up space? Yes • Does air always take up the same amount of space? No, air can be pushed into smaller space or pulled into a larger space.

  9. Compress and Expand Air that forced into smaller space is compressedair. When the force holding air in a smaller space is removed, the airexpands. When matter expands, it occupies more space. A given mass of compressed air occupies less space than the same mass of air when it is expanded.

  10. Air As Matter What is happening to the air in the syringe? What about the air in the bubble? What about the cubes in the syringe? Air In a Syringe Air As Particles Gas Information Air as Matter

  11. Air In A Syringe Draw the air particles in syringe B - E Explain why you drew the air particles in the syringes the way you did? In syringe B: In syringe C: In syringe D: In syringe E:

  12. Air As Particles What is the air in the syringe and the air in the bubble made of? • Air particles, mostly nitrogen and oxygen. What happens to the air particles in the syringe when you push on the plunger? • Air particles get forced closer together; they are compressed into smaller volume. What happens to the air particles in the bubble when you pull up on the plunger? • Pulling creates a larger volume. Air particles expand to fill the larger volume.

  13. Air As Particles Are there more air particles in the bubble when it is compressed or when it is expanded? • The syringe is a closed system, so the number of particles does not change. When you push on the plunger, are the air particles closer together in the syringe or in the bubble? • Closer together in both subsystems, but equally close together in both.

  14. Air As Particles What is between the air particles? • Space; distance; void; nothing (except possibly other air particles.) What happens to air particles when a volume of air is compressed? Expanded? • Nothing happens to the particles themselves; compressed they just get closer and expanded they just get farther apart.

  15. Air As Matter What happened to the blue cube when air around itwas compressed? • Blue cube got smaller because the particles were compressed into a smaller volume. How do you explain the blue cube getting smaller when air around it is compressed? • The cells are all closed systems. Particles can’t enter or leave cells. The air outside the cube is compressed. The air pushes on the cube. The air in the little bubbles inside the foam cube is compressed so the cube gets smaller.

  16. Air As Matter Are there more air particles, fewer air particles, or the same number of air particles inside the closed cells when the cube is compressed? • Same number! Closed so the number of particles will not change. How do you explain the pink bubble getting smaller when air around it is compressed? • The cells are all closed systems. Particles can’t enter or leave cells. The air outside the bubble is compressed. The air pushes on the bubble. The air in the is compressed so the bubble gets smaller.

  17. Air As Matter Explain what happened to the air particles outside the blue cube? • They were compressed. They got closer together because the volume decreased. Explain what happened to the particles inside the blue cube? • They were compressed. Inside the syringe.

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