Notes%2009.22.10

# Notes%2009.22.10 - • This has a variety of names –...

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1 Meeting 8--Sections 3-6–3-8, 4-1

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2 Reduced properties In those cases use the pseudoreduced volume: c c c c R RT vP /P RT v v = =
3 Compressibility factor for ten substances

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4 TEAMPLAY Use the compressibility factor to determine the error in the specific volume if oxygen gas at 160 K and 3 MPa is treated as an ideal gas.
5 More complex equations of state Van der Waals

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6 Beattie-Bridgeman : where
7 What did an integral represent in calculus? P v 1 2 A R E A = 2 1 PdV W

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8 Moving boundary work = 2 1 PdV W Work for a closed, compressible system is given by

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Unformatted text preview: • This has a variety of names: – expansion work – PdV work – boundary work – compression work 9 Some Common P(V) Paths • P=C , constant pressure process • P=C/V, ideal gas, const.temp. process • PV n =C, polytropic process 10 Polytropic process ∫ = V V PdV W 2 1 A frequently encountered process for gases is the polytropic process: constant c PV n = = Since this expression relates P & V, we can calculate the work for this path....
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Notes%2009.22.10 - • This has a variety of names –...

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