Question

Varog ajutor !!!! Aveți poza mai jos cu ex 5

Answer 1

gaz biatomic=>γ=1,4

Cv=5R/2

Cp=Cv+R=5R/2+R=7R/2

Qp=υCpΔT                

Qc=υCvΔT

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Qp/Qc=Cp/Cv=>Qc=QpCv/Cp=700*5R/2/7R/2=700*5*2/14=7000/14=500 J

Qp=υCpΔT=7RυΔT/2=>υRΔT=2Qp/7=2*700/7=200 J

Lp=υRΔT=200 J

Lc=0

Lt=Lp+Lc=290+0=200 J

ΔUp=υCvΔT=Qc=500 J

ΔUc=υCvΔT=500 J

ΔUt=ΔUp+ΔUc=500+500=1000 J=1 kJ