Gas pressure & volume

Gas pressure & volume - Gas pressure& volume Gas...

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Unformatted text preview: Gas pressure & volume Gas p X V = Constant Constant For example, suppose we have a theoretical gas For confined in a jar with a piston at the top. The initial state of the gas has a volume equal to 4.0 cubic meters and the pressure is 1.0 kilopascal. With the temperature and number of moles held constant, weights are slowly added to the top of the piston to increase the pressure. When the pressure is 1.33 kilopascals the volume decreases to 3.0 cubic meters. The product of pressure and volume remains a constant (4 x 1.0 = 3 x 1.33333 ). Given below is the experimental data of specific amount of a fixed mass of gas at constant temperature fixed P(atm) volume(cm3) p X V(atmXcm3) V(atmXcm p1 = 1 V1 = 8 1 X8 = 8 p2 = 2 V2 = 4 2X4=8 p3 = 4 V3 = 2 4X2=8 Boyle’s Law Boyle’s For a fixed mass of gas, at constant temperature: For p V = constant constant p1V1 = p2V2 Or Volume is inversely proportional to pressure Volume V ∝ 1/p Solve Solve An exhaust pump is connected to a flask An of volume 100 cm3. The volume swept out of The by the piston is 25 cm3 for each stroke. by The pressure in the vessel is originally 1 atm. atm. By considering one stroke at a time, find the pressure in the vessel after two strokes. solve solve A 6 llitre container of gas has a pressure itre of 8.2 atm. i) Calculate the new volume occupied by i) Calculate the gas if the pressure is reduced by 3 atm at the same temperature. ii) What will be the new volume if the ii) What pressure is reduced to 4 atm in the given example? example? This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching. ...
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