Question

Problema 1.
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Answer 1

Pt.S₁:Fp₁=Fp₀₁+T+m₁g=>pS₁=p₀S₁+T+m₁g=>T=(p-p₀)S-m₁g

Pt.S₂:Fp₂+G₂=Fp₀₂+T=>pS₂+m₂g=p₀S₂+T=>T=(p-p₀)S₂+m₂g

(p-p₀)S-m₁g=(p-p₀)S₂+m₂g<=>(p-p₀)(S₁-S₂)=(m₁+m₂)g=>p=p₀+mg/ΔS=10⁵+10/2*10⁻⁴=10⁵+10⁵/2=1,5*10⁵ Pa

V₁/T₁=(V₁+ΔV)/(T₁+ΔT)=>V₁/T₁=(V₁+S₁Δl-S₂Δl)/(T₁+ΔT)=>V₁ΔT=T₁Δl(S₁-S₂)=>Δl=V₁ΔT/T₁ΔS

pV₁=υRT₁=>V₁=υRT₁/p

Δl=υRΔT/pΔS=1000*8,31*10/1,5*10⁵ *2*10⁻⁴=27,7 cm

ΔV=S₁Δl-S₂Δl=ΔSΔl=2*10⁻⁴*0,277=0,5*10⁻⁴ m³

Q=υCpΔT=7υRΔT/2=3,5*1000*8,31*10≅29 kJ