Gaslaw - p 1 /p 2 = T 1 /T 2 General pV/T =constant p 1 V 1...

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Liu UCD Phy9B 07 1 Ch 18. Thermal Properties of Matter
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Liu UCD Phy9B 07 2 18-1. Equations of State State variables: Variables that define the state of a system e.g., pressure p , volume V , temperature T, mass m or mole number n . Equation of state: The relationship among p, V, T, m (n) Study analytical expressions for simple cases. Equilibrium state: System variables uniform in space & not changing w/ time
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Liu UCD Phy9B 07 3 Ideal Gas Law pV=n mole RT Universal Gas Constant R=8.315 J/(mol-K) = 0.08206 L atm/(mol-K) Mole number n mole = mass (gram)/Molecular mass (g/mol) At constant T pV = constant Boyle’s law p 1 V 1 = p 2 V 2 At constant P V T Charles’ law V 1 /V 2 = T 1 /T 2 At constant V p T Gay-Lussac’s law
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Unformatted text preview: p 1 /p 2 = T 1 /T 2 General pV/T =constant p 1 V 1 /T 1 = p 2 V 2 /T 2 Standard Temperature & Pressure (STP): 0C 1atm=1.013x10 5 N/m 2 =1.013x10 5 Pa Liu UCD Phy9B 07 4 Avogadros Number Avogadros hypothesis: Equal volumes of gas at the same p and T contain equal number of molecules. Number of molecules in 1 mole: N A =6.02 x 10 23 Ideal Gas law: pV=nRT =(N/N A )RT =N(R/N A )T =Nk B T Boltzmanns constant k B =R/N A = 1.38x10-23 J/K Liu UCD Phy9B 07 5 pV-Diagrams Each curve, representing behavior at a specific T, is an isotherm. Isolated system of ideal gas, along each isotherm, pV =constant....
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This note was uploaded on 02/17/2009 for the course PHY na taught by Professor Richardscalettar during the Spring '09 term at UC Davis.

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Gaslaw - p 1 /p 2 = T 1 /T 2 General pV/T =constant p 1 V 1...

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