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Gas Laws: Hands-on DiscoveryPowerPoint Presentation

Gas Laws: Hands-on Discovery

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Gas Laws: Hands-on Discovery

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Gas Laws:Hands-on Discovery

Welcome!

Developer and publisher of inquiry-based science curriculum and hands-on materials

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Press 101.53 (KPA)

Press 101.53 (KPA)

- A pascal (Pa) = 1 N/m2
- 1 kPa = 1000 Pa
- Standard atmospheric pressure = 101,325 Pa
- Or 101.325 kPa

- What does your pressure sensor read for standard atmospheric pressure?

- Suppose you connect a syringe to the pressure sensor.
- What would you have to do with the syringe to make the pressure increase? How would you make the pressure decrease?

Pressure (kPa)

Time (s)

Pressure (kPa)

Time (s)

- Boyle’s law states that there is a mathematical relationship between pressure and volume that always equals a constant value.
- The relationship is either:

- Find the pressure at these volumes
- 10, 12, 16, 18
- Graph pressure vs. volume by hand
- What is the constant value?

- Use your data to predict the pressure at 14 mL.
- Try it and see how close your prediction was.

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Predict: Does the pressure in the bottle increase or decrease when you pull down on the flexible bottom? What % change in pressure do you expect?