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Honors Chemistry Unit 12 - Gases. Lesson 1 – Manometers Book Section: 11-1 Do Now: Prepare for Quiz 12-1. Barometers. A barometer is a device that can measure atmospheric pressure. The atmospheric pressure pushes the mercury up the tube.

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Honors Chemistry Unit 12 - Gases


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    1. Honors ChemistryUnit 12 - Gases Lesson 1 – Manometers Book Section: 11-1 Do Now: Prepare for Quiz 12-1

    2. Barometers • A barometer is a device that can measure atmospheric pressure. • The atmospheric pressure pushes the mercury up the tube. • The height difference represents the pressure in mm Hg, or millimeters of mercury.

    3. Manometers • A manometer works in a similar fashion – but measures the pressure of a container of gas instead of the atmosphere. • There are two types: closed-end and open-end manometers.

    4. Manometers • An open-end manometer is used to measure the difference between atmospheric pressure and that of a gas in a vessel. • The atmosphere pushes down on the open end. • Pgas = Patm + h • (in mm Hg)

    5. Manometers • A closed-end manometer will only measure the pressure of the gas inside the vessel. • The atmosphere can not affect the manometer. • Pgas = h

    6. 3 Manometers… analyze each

    7. 3 Manometers… analyze each • If h1, h2, and h3 are equal to 50 mm Hg, what is Pgas? • Assume that Patm = 760 mm Hg (standard pressure)

    8. Homework: #3 • Next week: • Monday: MAP Testing • Tuesday: Absolute Zero Lab • Wednesday: MAP Testing • Thursday: Absolute Zero Lab • Friday: Spanish Festival