c161l11_10_01 - Measuring pressure Measures absolute...

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Measuring pressure Measuring pressure
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Measures absolute pressure Measures difference in pressure
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Pressure is an Intensive Pressure is an Intensive property property
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Putting it all together: the Putting it all together: the Ideal Gas Law Ideal Gas Law W PV = nRT Greater V, fewer collisions, less pressure More particles, more collisions, greater pressure Higher temperature, faster particles, more frequent collisions, more pressure W R is the gas constant Use the correct value of R for the units you are using R = 0.08206 L atm mol -1 K -1 R = 8.3145 J mol -1 K -1 Pa m Pa m 3 = kg m = kg m -1 s -2 m 3 = kg m = kg m 2 s -2 = J = J
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How to Use the Ideal Gas How to Use the Ideal Gas Law Law W Convert pressure to atm (or Pa) W Convert volume to L (or m 3 ) W Convert temperature to K
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Example Example W What volume does 1 mol occupy at 27 °C and 1 atm? 1 atm V = 1 mol (0.08206 L atm mol -1 K -1 ) (27 + 273.15) V = 24.63L W We can ask about number of moles (mass), volume, pressure or temperature.
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More on the Ideal Gas Law More on the Ideal Gas Law W PV = nRT W Questions we can answer number of moles pressure volume temperature mass (to moles)
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Related questions Related questions W Determine the molar mass of a gas PV = mRT/M M = mRT/(PV) = dRT/P (more later)
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This note was uploaded on 04/06/2011 for the course CHEMISTRY 161 taught by Professor Seigel during the Fall '10 term at Rutgers.

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c161l11_10_01 - Measuring pressure Measures absolute...

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