Solutions and Gases Calculations (2)
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Lone Star Chemistry Solutions
A Dozen or More A Dozen or More CalculationsCalculations
GasesGasesMason, Koeck, and KulhanekMason, Koeck, and Kulhanek
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Lone Star Chemistry Solutions
BCCEBCCEAugust 1-5August 1-5
University of University of North TexasNorth Texas
Denton, TexasDenton, Texas
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Lone Star Chemistry Solutions
TEKS Development TEKS Development and Correlation to and Correlation to
CCRSCCRS Lone Star Lone Star Chemistry Chemistry SolutionsSolutions
https://callevents.unt.edu/ei/getdemo.ei?https://callevents.unt.edu/ei/getdemo.ei?id=3&s=_3000VYEX3id=3&s=_3000VYEX3
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Lone Star Chemistry Solutions
EngagementEngagement
GasesGases
Dynamic Diana’s Daring Dynamic Diana’s Daring DemoDemo
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Lone Star Chemistry Solutions
ExplorationExploration
Boyle’s LawBoyle’s Law
The pressure of a gas at The pressure of a gas at constant temperature is constant temperature is directly proportional to its directly proportional to its volume.volume.
PV= kPV= k
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Lone Star Chemistry Solutions
ExplorationExploration
Boyle’s LawBoyle’s Law
A gas that is at a constant A gas that is at a constant temperature has a volume of temperature has a volume of 5.0 L at a pressure of 2 atm. 5.0 L at a pressure of 2 atm. What is the volume of the same What is the volume of the same gas if the pressure is increased gas if the pressure is increased to 3 atm.?to 3 atm.?
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Lone Star Chemistry Solutions
ExplorationExploration
Boyle’s LawBoyle’s Law
A gas that is at a constant A gas that is at a constant temperature has a volume of temperature has a volume of 9.0 L at a pressure of 2 atm. 9.0 L at a pressure of 2 atm. What is the pressure of the What is the pressure of the same gas if the volume is same gas if the volume is decreased to 3.0 L?decreased to 3.0 L?
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Lone Star Chemistry Solutions
ExplanationExplanation
Conceptual Conceptual UnderstandingUnderstandingBoyle’s LawBoyle’s Law
5.0 L X 2 atm = 3.3 L 3 atm
P 1V1 = P2 V2
V2 = P1 V1
P2
= 5.0 L X 2 atm = 3.3 L 3 atm
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Lone Star Chemistry Solutions
ExplanationExplanation
Conceptual Conceptual UnderstandingUnderstandingBoyle’s Law #2Boyle’s Law #2
2 atm X 9.0 L = 6 atm 3.0 L
P 1V1 = P2 V2
P2 = P1 V1
V2
= 2 atm X 9.0 L = 6 atm 3.0 L
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Lone Star Chemistry Solutions
ElaborationElaboration
Derivation of Derivation of Graham’s Law of Graham’s Law of DiffusionDiffusion
Materials:
Glass Tubes 50-80 cm in length6 M HCl6 M NH4OHMeter StickCotton Balls
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Lone Star Chemistry Solutions
EvaluationEvaluation
What is the What is the Concentration?Concentration?Using the expression for kinetic energy,Using the expression for kinetic energy,
KE = ½ m vKE = ½ m v22
Derive Graham’s Law of Diffusion.Derive Graham’s Law of Diffusion.
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Lone Star Chemistry Solutions
A Dozen or More A Dozen or More CalculationsCalculations
Additional ConceptsAdditional ConceptsCharles’ Law, Dalton’s Law, Ideal Gas Law, Charles’ Law, Dalton’s Law, Ideal Gas Law,
Gas StoichiometryGas Stoichiometry