9-Entropy calculation and ideal work(new)

9-Entropy calculation and ideal work(new) - Molecular...

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Unformatted text preview: Molecular BioEngineering Laboratory ioE Entropy calculation and ideal work ¡ Entropy calculation for ideal gases in a simple closed system ¡ Ideal work done by simple closed systems ¡ Helmholtz free energy ¡ Entropy balance over a flow system ¡ Ideal work done by a flow system ¡ Gibbs free energy BioE 1. Calculation of Δ S for ideal gases under an isothermal process 1 2 1 2 , , ln ln / / process, Isothermal 1. / / / / / ) ( / ) ( , P P nR V V nR S P nRdP V nRdV dS P nRdP T dT nC V nRdV T dT nC dS T VdP dH T PdV dU dS VdP TdS dH PdV TdS dU m P m V − = = Δ − = = − = + = − = + = + = − = BioE 2. Calculation of Δ S for ideal gases under a constant volume process constant. a is if , ln / process, olume Constant v 2. / / / / / ) ( / ) ( , , 1 2 , , , , m V m V m V m P m V C T T nC S T dT nC dS P nRdP T dT nC V nRdV T dT nC dS T VdP dH T PdV dU dS VdP TdS dH PdV TdS dU = Δ = − = + = − = + = + = − = BioE 3. Calculation of Δ S for ideal gases under an isobar process constant. a is if , ln / process, pressure Constant 3. / / / ) ( / ) ( , 1 2 , , , m P m P m P m P C T T nC S T dT nC dS P nRdP T dT nC dS T VdP dH T PdV dU dS PdV TdS dU = Δ = + = − = + = − = BioE The third law of thermodynamics C P /T ) ( ) ( ) ( ) ( ) ( ) ( = + Δ + + Δ + = − ∫ ∫ ∫ S dT C T H dT C T H dT C S T S T T g P b vap T T l P f f T s P b b f f BioE 4. Calculation of 4....
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This note was uploaded on 11/11/2010 for the course CHE CH2005 taught by Professor 曹恒光 during the Spring '10 term at National Central University.

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9-Entropy calculation and ideal work(new) - Molecular...

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