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Aim : What is Avogadro’s hypothesis? (and application of gas laws.)

Aim : What is Avogadro’s hypothesis? (and application of gas laws.). Essential Questions : Why are the ideal conditions for gases low pressure and high temperature ? Describe how you would prove that gases are matter.

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Aim : What is Avogadro’s hypothesis? (and application of gas laws.)

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  1. Aim: What is Avogadro’s hypothesis? (and application of gas laws.) Essential Questions: • Why are the ideal conditions for gases low pressure and high temperature? • Describe how you would prove that gases are matter. • “Nowhere around you is the absence of air.” Explain this statement using your knowledge of gas behavior. • Equal volumes of different gases under the same conditions of temperature and pressure have the same number of molecules. Explain. (Hint…next Q) • Why are gases compressible?

  2. Aim: What is an ideal gas and how to apply the gas laws to solve problems? • Predict what would happen to the size of a balloon if the gas inside was heated. • Explain observations relating to “balloon on hot plate demo.” • Describe relationship between temperature of a confined gas and its volume.

  3. Aim: What is Avogadro’s Hypothesis? (and application of gas laws) Gases take up space because… • Gases are a form of matter and matter takes up space What are some properties of gases? • Gases diffuse rapidly • Gases exert pressure • Gases fill their container completely • Gases are compressible

  4. Aim: What is an ideal gas and how to apply the gas laws to solve problems? • Explain how a mercury barometer works. • How are the units of pressure related to each other? • Why would you rather have a person wearing shoes step on your hand than a person wearing ice skates? Explain in terms of pressure. • Explain illustration on handout comparing air pressure at sea level and atop Mt. Everest.

  5. Aim: What is an ideal gas and how to apply the gas laws to solve problems? • Why are gases compressible? • Describe relationship between pressure exerted on a confined gas and its volume. • Why are weather balloons only filled partway with Helium gas? • Predict what would happen if weather balloons were completely filled. • Why are motorists advised to check their tire pressure as it gets cold in the winter? • Why does the mass, and therefore the number of particles, remain constant even though temperature and pressure may be changing? Explain.

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