Thermodynamics Chapter 4 Review notes

Thermodynamics Chapter 4 Review notes - Thermodynamics...

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Thermodynamics Chapter 4 Review 4.1 Moving Boundary Work Moving Boundary Work – work done through expansion and compression - analysis is done under quasi-equilibrium status - the differential work done in thei matter is as follows: PdV PAds Fds W b = = = δ = 2 1 Pdv - this is why moving boundary work is called P dV work - The area under the curve of a P-V diagram is equal to the total work done over that process Polytropic Process Polytropic process – doing actual expansion and compression process of gasses, pressure, and volume: n CV P - = - when this is substituted into earlier equation: n V P V P n V V C dV CV PdV W n n n b - - = + - - = = = + - + - - 1 1 1 1 2 2 1 1 1 2 2 1 2 1 For an Ideal Gas: (PV = mRT) n T T mR W b - - = 1 ) ( 1 2 n not equal to 1 For special case where n=1 which is an iso-thermal process for an ideal gas: = 1 2 ln V V PV W b 4.2 Energy Balance for Closed Systems - For any process the energy change is as follows: dt dE E E E E E
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Thermodynamics Chapter 4 Review notes - Thermodynamics...

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