process

process - Thermodynamic Processes States of a thermodynamic...

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Thermodynamic Processes • States of a thermodynamic system can be changed by interacting with its surrounding through work and heat. When this change occurs in a system, it is said that the system is undergoing a process . • A thermodynamic cycle is a sequence of different processes that begins and ends at the same thermodynamic state. • Some sample processes: ! Isothermal process: temperature is constant T=C ! Isobaric process: pressure is constant, P=C ! Isentropic process: entropy is constant, s=C ! Constant-volume process, v=C ! Adiabatic process: no heat transfer, Q=0
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Process-1 • Use ideal gas assumption (closed system): 2 1 21 12 Isothermal process: T=constant Energy balance U=Q-W, for ideal gas U= H=0 since both are functions of temperature only Q=W, W= P ln Isobaric process: mRT dV dV dV mRT VV VP mRT mRT ∆∆ ==    ∫∫ 2 1 2 1 22 1 1 P=constant U=Q-W, W= PdV=P dV=P(V ) () ( ) ( ) V QU P V V U UP V V V U P V HH H ∆− = +− = =+ + = =
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Process-2 v v
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This note was uploaded on 11/27/2011 for the course EML 3002c taught by Professor Staff during the Fall '08 term at FSU.

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process - Thermodynamic Processes States of a thermodynamic...

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