T₁=7°C=280 K
T₂=420 K
V₁=V₂=V=constant=>p₁/T₁=p₂/T₂=>p₂=T₂*p₁/T₁=10⁵*420/280=1,5*10⁵=1.5 atm
μ=28 g/mol=0,028 kg/mol
p₁V=ν₁RT₁=>ν₁=p₁V/RT₁=10⁵*1/8,314*280=42,95 moli
ν₁=m₁/μ=>m₁=ν₁*μ=1,2 kg
ρ₁=m₁/V=1,2 kg/m³
p₂V=ν₂RT₂=>ν₂=p₂V/RT₂=1,5*10⁵*1/8,314*420=42,95 moli
ν₂=m₂/μ=>m₂=ν₂*μ=1,2 kg
ρ₂=m₂/V=1,2 kg/m³
Δρ=0
