Lo 3 The student is able to select and apply mathematical relationships to mass data in order to justify a claim regarding the identify and/or estimated purity of a substance. (Sec 5, 7) lo 3

Barometer

• Device used to measure atmospheric pressure.
• Mercury flows out of the tube until the pressure of the column of mercury standing on the surface of the mercury in the dish is equal to the pressure of the air on the rest of the surface of the mercury in the dish.

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Manometer

• Device used for measuring the pressure of a gas in a container.

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Collapsing Can

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Pressure Conversions: An Example

• The pressure of a gas is measured as 2.5 atm. Represent this pressure in both torr and pascals.

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AP Learning Objectives, Margin Notes and References

• Learning Objectives
• LO 1.4 The student is able to connect the number of particles, moles, mass, and volume of substances to one another, both qualitatively and quantitatively.
• LO 2.4 The student is able to use KMT and concepts of intermolecular forces to make predictions about the macroscopic properties of gases, including both ideal and nonideal behavior.
• LO 2.6 The student can apply mathematical relationships or estimation to determine macroscopic variables for ideal gases.