ATMS301_LECTURE5 0.0 / 5 ? PhysicsATMOSPHERE THERMODYNAMICS UniversityNone Created by: ENee97Created on: 18-09-18 03:27 1st law of thermodynamics dq = du + dw 1 of 8 version 1 of the 1st law dq = CvdT + pda 2 of 8 what is specific heat at const vol? Value? Unit? Cv = (du/dT)a const , 717 J/kg/K for dry air 3 of 8 what is specific heat at const pa? Value? Unit? Cp = (du/dT) p const or Cp = Cv + Rd , 1005 J/kg/K 4 of 8 adiabatic (dq = 0) eqn? CvdT = -pda or CvdT = adp 5 of 8 isothermal (dT = 0) eqn? dq = adp = pda = dw , isothermal doesn't have a teperature change 6 of 8 isochoric (da = 0) eqn? vol is constant, dq = Cv.dT = du 7 of 8 isobaric (dp = 0) eqn? dq = CpdT = (Cp/Cv).Cv.dT = (Cp/Cv)du 8 of 8
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