Question

 If the density of oxygen is 1.44 kg/m³ at a pressure of 10⁵ N/m², find the root mean square velocity of oxygen molecules.

Answer 1

Given : ρ = 1.44 kg/m³ , P=10⁵ N/m²

∴ The root mean square velocity of oxygen molecules

 \(v_{rms} =\sqrt{\frac{3P}{ρ}}\)

= \(\sqrt{\frac{3×10^5}{1.44}}\) m/s

= 4.564 × 10² m/s