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# density calculation problem?

The density of liquid n-pentane is 0.630 g/cm^3 at 18 °C and 1 bar. Estimate its density at 140 °C and 120 bar.

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- AshLv 74 weeks agoBest Answer
ρ₁ = 0.630 g/cm³

T₁ = 18°C + 273 = 291 K

P₁ = 1 bar

ρ₂ = ?

P₂ = 120 bar

T₂ = 140°C + 273 = 413 K

P₁/(ρ₁T₁) = P₂/(ρ₂T₂)

ρ₂ = P₂ρ₁T₁/P₁T₂ = 120*0.630*291/(1*413) = 53.3 g/cm³

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