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Equilibrium Processes in Gases. 1. law:. V=const. Processes in Ideal Gases. Q. Equilibrium process: Quasi-static process which transforms the system through states of thermal equilibrium. Slow (almost unchanging) with respect to the
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Equilibrium Processes in Gases 1. law: V=const. Processes in Ideal Gases Q Equilibrium process: Quasi-static process which transforms the system through states of thermal equilibrium Slow (almost unchanging) with respect to the typical relaxation times of a system Equilibrium processes are represented by lines in the state space Constant volume (isochoric) processes: 0 No work done
1. law: P=const. m Q Constant pressure (isobaric) processes P=const. Isothermal processes Work done @ T=const. T=const.
1. law: Adiabatic processes: No heat heat transfer in or out of the system Q=0 How to realize an adiabatic process very good insulation 1 or no time for heat to be exchanged rapid changes in volume 2 0 V0 Note: although the constant volume specific heat appears, expression applies to any process that starts and ends in equilibrium In the limit V0 First order differential equation V0
Solution of by integration with with different from constant above
What is the work done in an adiabatic equilibrium process during entire adiabatic process Starting at P0 and V0
Thigh Tlow Graphic summaryof various processes on a PV diagram: Constant pressure (isobaric) process Constant volume (isochoric) process adiabatic process Q=0 Constant temperature (isothermal) process Isotherms for reference Adiabat steeper than isotherm