# Gas pressure pressure force area psi pressure per

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Chem 1035 Chapter 5 7 of 41Mercury Barometer: Device used to measure atmospheric pressure
Chem 1035 Chapter 5 8 of 41Gas Laws:Relationships Between Gas Pressure, Volume,Temperature, and MolesPressure vs. Volume:Boyle's Law: At constant temperature, the volume of a fixed mass of gas isInversely proportional to the pressure.P VV 1/P
Chem 1035 Chapter 5 9 of 41V 1 / p OR. PV = constant
Chem 1035 Chapter 5 10 of 41Sample data:Volume (mL)Pressure (torr)11(torr)PressureP × V (torr∙mL)20.07800.001281.56×10415.010380.0009631.56×10410.015600.0006411.56×1045.031120.0003211.56×104
Chem 1035 Chapter 5 11 of 41Boyle’s Law:
Chem 1035 Chapter 5 12 of 41Volume vs. Temperature:Charles' Law:At constant pressure, the volume of a fixed mass of gas is Directly proportional to the Kelvin temperature.Volume (L) HeV TV/T = constantCH4K = C* + 273H2O H2Absolute zero:Lowest obtainable temp(no motion, zero volume)V1/T1= V2/T2
Chem 1035 Chapter 5 13 of 41T (K)
Chem 1035 Chapter 5 14 of 41Sample Data:V/T = constant
Chem 1035 Chapter 5 15 of 41
Chem 1035 Chapter 5 16 of 41Pressure vs. Temperature:Amonton's Law: At constant volume, the pressure of a fixed amount of gas isGay- lusac’sDirectly proportional to the Kelvin temperature.P/T = constantP1/ T1= P2/T2P ^ , T ^Avogadro's Law: Equal volumes of different gases at the same temperature andpressure contain the same number of particlesV m (moles)
Chem 1035 Chapter 5 17 of 41
Chem 1035 Chapter 5 18 of 41Ideal Gas EquationCombine these laws:Boyle's Law: PV = kconstant tempp1v1= p2v2Charles' Law: V T or V = kTconstant pressurev/t = v/tAmonton's Law: P T or P = kTconstant volumep/t =p/tAvogadro's Law: V nV = knCombined gas law : P1V1/ T1= P2V2/ T2PV nT
Chem 1035 Chapter 5 19 of 41
Chem 1035 Chapter 5 20 of 41R = gas constant (0.0821 L x atm / molx K)
Chem 1035 Chapter 5 21 of 41Calculations with the Ideal Gas Law:Assume constant temp
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