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Unformatted text preview: Isothermal – Constant Temperature Isobaric – Constant Pressure Isochoric – Constant Volume Isentropic – Constant Entropy Process Ideal Gas Polytropic Process (Many Properties remain constant) – pv n = constant (when n=0, isobaric; when n=1, isothermal; n = k, isentropic; n ∞, isochoric) Piston system of gas under pressure and cooled in an ice bath n=0; constant p n=1, constant T n=k, constant s n ∞, constant v Steady-flow – the rate of flow-in equals the flow-out and does not change with time Uniform Flow – the velocity is constant throughout the system Temperature Scales Degrees signify a relative scale Zeroth Law of Thermodynamics – transitive property of temperatures Weight = mg = ρ(Adz)g ΣF = 0 pA – (p + dp)A +pgAdz = 0-dp +pgdz = 0 dp/dz = pg (pressure increases with depth) 1 atm (14.7psia/ 101.3kPa absolute zero Vacuum Pressure Gauge Pressure Absolute Pressure P abs = P atm – P vac...
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This note was uploaded on 04/07/2008 for the course MECH 213 taught by Professor Knisley during the Fall '08 term at Bucknell.
- Fall '08