Chapter 5 - Chapter 5: Gases 5.1 Early Experiments The most...

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Chapter 5: Gases 5.1 Early Experiments The most commonly used units for pressure are based on the height of the mercury column (in mm) the gas pressure can support. The unit mm Hg (millimeters of Mercury) is called the torr in honor of Torricelli. A related unit for pressure is the standard atmosphere. o 1 standard atmosphere = 1 atm = 760 mm Hg = 760 torr o Pressure = force/area o Force measured in newton (N) and area measured in meters squared (m 2 ) o Pascal is newtons per meter squared (N/m 2 ) o 1 standard atmosphere = 101,325 Pa 5.2 The Gas Laws of Boyle, Charles, and Avogadro Boyle’s Law o PV = k, k is a constant at a specific temperature for a given sample of air. There is an iverse relationship between pressure and volume. o Boyle’s Law only approximately describes the relationship between pressure and volume for a gas. o A gas that obey Boyle’s Law is called an ideal gas. o Predicts the new volume of a gas when the pressure is changed (at constant temperature), or vice versa. Charles’s Law o Found that the volume of a gas at constant pressure increases linearly with the temperature of he gas. o
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This note was uploaded on 06/25/2008 for the course CH 301 taught by Professor Fakhreddine/lyon during the Fall '07 term at University of Texas.

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Chapter 5 - Chapter 5: Gases 5.1 Early Experiments The most...

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