CH 14 Notes

CH 14 Notes - Chapter 4 Introduction to Gases Problems

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Chapter 4 Introduction to Gases Problems 15,25,27,31,33,35,37,39,41,43,51,53 4.1 Properties of Gases 1. Gases may be compressed 2. Gases expand to fill their container 3. Gases have low density 4. Gases may be mixed 5. Gases exert pressure on the walls of a container
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4.3 Gas Measurements Pressure: The force exerted on an area Pressure Units: 1 atm = 760 torr = 760 mm Hg Temperature: Kelvin Standard Temperature and Pressure (STP) 273 K (0hC) 1 atm (760 torr)
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4.4 The Volume-Temperature Law (Charles’ Law) The volume of a gas is directly proportional to it’s absolute temperature. V r T increase T, increase V or V = kT (k is a constant) For 2 different temperatures: V 1 = kT 1 and V 2 = kT 2 or V 1 = V 2 T 1 T 2 or V 2 = (V 1 )(T 2 )/T 1 If we know the volume at one temperature, we can calculate the volume at another temperature.
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4.4 Charles’ Law example Calculate the new volume when a balloon of 1.00 L is taken outside from a freezer hot summer day: a temperature change from -20r C to 40.0r C.
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4.5
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CH 14 Notes - Chapter 4 Introduction to Gases Problems

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