Gas Laws

Gas Laws - Chapter 7 Gases Pressure and Volume (Boyles Law)...

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Chapter 7 Gases Pressure and Volume (Boyle’s Law) Temperature and Volume (Charles’ Law) Temperature and Pressure (Gay-Lussac’s Law)
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Pressure and Volume Experiment Pressure Volume P x V (atm) (L) (atm x L) 1 8.0 2.0 16 2 4.0 4.0 _____ 3 2.0 8.0 _____ 4 1.0 16 _____ Boyle's Law P x V = k (constant) when T remains constant
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P and V Changes P 1 P 2 V 1 V 2
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Boyle's Law The pressure of a gas is inversely related to the volume when T does not change Then the PV product remains constant P 1 V 1 = P 2 V 2 P 1 V 1 = 8.0 atm x 2.0 L = 16 atm L P 2 V 2 = 4.0 atm x 4.0 L = 16 atm L
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PV Problem Freon-12, CCl 2 F 2 , is used in refrigeration systems. What is the new volume (L) of a 1.6 L sample of Freon gas initially at 50 mm Hg after its pressure is changed to 200 mm Hg at constant T?
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PV Calculation Prepare a data table DATA TABLE Initial conditions Final conditions P 1 = 50 mm Hg P 2 = 200 mm Hg V 1 = 1.6 L V 2 = ? ?
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Find New Volume (V 2 ) Solve for V 2 : P 1 V 2 = P 2 V 2 V 2 = V 1 x P 1 /P 2 V 2 = 1.6 L x 50 mm Hg = 0.4 L 200 mm Hg
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A sample of nitrogen gas is 6.4 L at a pressure of 0.70 atm. What will the new volume be if the pressure is changed to 1.40 atm? (T constant) Explain. 1)
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Gas Laws - Chapter 7 Gases Pressure and Volume (Boyles Law)...

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