Introduces Entropy | Duke University

University:
Duke University
Course:
PHYSICS 363 | Thermal Physics
Academic year:

2023
Views:

189

Pages:

2
Author:

Pemuda H

Isentropic must be adiabatic and reversible 6 ²+(rev 0 T 2 SQ S- So 2nd Law of Thermodynamics nonproperty property introduces entropy Sgen-S2-5-2 T Entropy variation Entropy transfer Combining 1st and 2nd Law... $SW+LE 20 T w = pav de = du => pav+du so T Zeroth Law of Thermodynamics: 2.4.4 if TA=Tc and To = To then TA-TB 1st Law of Thermodynamics for a CV 2.4.5 dE dt = dt Ps,s Power due to shear and shaft LE = #ped = (ped + √ pe vindo → e = u + ½ +92 + esther +gz σ neglect <<= SSWn = pido de Spidode = SWn σ de dt V= PnPower due to normal forces St = p (pr)vidoh=u+ SQ →=PB,s+fe (ped + Sp(h+2+gz) v. ndo 2nd Law of Thermodynamics for a CV 2.4.6. #52() S Q= St psd = → S= m T + σ Thermodynamics of Single Phase Gases 2.4.7 Pure substance - has two independent properties that do not depend on time =RT PY=RT R-universal gas constant and RM-molecular weight L -gas constant Have u (Tv) du = (4)T+ dr = →Cv= Cv = () 2 Uz-U, = S CULT = Cu(T2-T.) Cv average Have h = u + pv = u + RTh(Tp) ah = spdp = Cpat Cp = (4) (4)T+() → 2 h₂-n, Cpat = Cp (T2-T) Relationship Between Cp and Cv n = d(URT) = CV + R = CP dh dt = Cp