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AP Chemistry Gases Flashcards

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7626903443Gases in terms of densityLow density because the few particles are spread out in a large volume0
7626908244Gases in terms of compressibilityEasy to compress because the particles are spread out in a lot of empty space1
7626910467Gases in terms of FluidityVery Fluid because particles are in constant motion and aren't attracted to each other so they can move easily around each other2
7626910468Gases in terms of diffusionDiffuse easily because particles are in constant motion, so they can mix freely with other types of gases. Two or more gases from a homogeneous mixture regardless of reactivity or identity3
7626914016Gases in terms of EffusionEasily effuse through tiny openings because they have no shape or permanent volume.4
7626914940Kinetic Molecular Theory1. Gases consist of large numbers of molecules that are in continuous random motion 2. The combined volume of all the molecules of the gas is negligible relative to the total volume in which the gas contained 3. Attractive and repulsive forces between gas molecules are insignificant 4. Energy can be transferred between molecules during collisions that are perfectly elastic but as long as the temperature stays constant, the average kinetic energy of the molecules don't change with time 5. The average kinetic energy of the molecules is proportional to the absolute temperature 6. Gases consist of tiny particles in empty space5
7626917745Ideal Gasideal gases are always gases regardless of temperature or pressure ideal gases cannot be liquified or solidified no attractive forces exist between the particles (atoms or molecules) the particles have no volume real gases behave "ideally" when the right conditions exist more ideal conditions: high temperature, high volume, low pressure, low moles6
7626917746Real GasHave volume Have attractive forces between the particles Behave ideally when high temperatures and low pressures Can be liquified or solidified7
7626919621PressurePressure is a force exerted by the substance per unit area on another substance. P=F/A8
7626919622Barometeran instrument measuring atmospheric pressure, used especially in forecasting the weather and determining altitude.9
7626920930Manometeran instrument for measuring the pressure acting on a column of fluid, especially one with a U-shaped tube of liquid in which a difference in the pressures acting in the two arms of the tube causes the liquid to reach different heights in the two arms.10
7627134407How do you find pressure of a gas in a manometer?P(gas)= p(atm)+p(height) in mmHg11
7626921080atm to mmHgmultiply by 76012
7626923745mmHg to Pamultiply by 1.01325e5/76013
7626923746atm to Pamultiply by 1.01325e514
7626923747atm to kPamultiply by 101.32515
7626927462mmHg to kPamultiply by 101.325/76016
7626929215Celsius to KelvinAdd 27317
7626931396Kelvin to CelsiusSubtract 27318
7626933264Boyle's lawThe volume of a fixed quantity of gas maintained at a constant pressure is inversely proportional to the pressure. P1V1=P2V2.19
7626936473Charles's LawThe volume of a fixed amount of gas maintained at a constant pressure is directly proportional to its absolute value. V1/T1=V2/T220
7626936474Gay Lussac's LawThe pressure of a gas is directly proportional to its Kelvin temperature. P1/T1=P2/T221
7626940430Avogadro's LawEqual volumes of gases at the same temperature and pressure contain equal numbers of moles. V1/n1=V2/n222
7626942586Combined Gas LawP1V1/T1=P2V2/T2 comes from ideal gas law23
7626944267Ideal gas lawPV=nRT Assumes that the molecules don't interact and the combined volume of the molecules id much smaller than the one the gas occupies24
7626946057RUniversal Gas Constant25
7626946058R in atm0.0820626
7626946238R in mmHg62.427
7626949547R in kPa and Pa8.3144728
7626951386Graham's LawThe rate of effusion of a gas is inversely proportional to the square root of its mass. r1/r2= the square root of MM2/MM129
7626953483Absolute ZeroThe temperature where all motion stops30
7626955473Dalton's LawThe total pressure of a mixture of gases equals the sum of the pressures that each would exert if it were present alone. P(total)=P1+P2+P3...31
7627382313Partial Pressurethe hypothetical pressure of that gas if it alone occupied the volume of the mixture at the same temperature.32
7626957632Conditions of STPPressure= 1atm Temperature= 273 or 0C Volume occupied by 1 mole at STP= 22.4 (molar volume)33
7626964305Kinetic EnergyKinetic energy is the energy an object possesses due to its motion. KE=1/2mv^2 or KE=3/2RT34
7626964306Root Mean Square Velocityv= the square root of 3(R)(T)/MM in kg/mol35
7626967630Conditions for most ideal gasesHigh Temperature Low Pressure Low moles36
7626970352Van der Waals Equationmathematically deals with the non-ideality of real gases. (P + n^2a/V^2)(V-nb) =nRT37

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