At What Kelvin Temperature Does the Rms Speed of the Oxygen

question 59

Multiple Choice

At what Kelvin temperature does the rms speed of the oxygen O₂) molecules in the air near the surface of Earth become equal to the escape speed from Earth? R = 8.31 J/mol · K; molar mass of O₂ gas is 32 g/mol; radius of Earth R_E = 6.37 × 10⁶ m; the escape speed from Earth is 11.2 km/s.)

• A) 4.8 × 10⁵ K
• B) 8.0 × 10⁴ K
• C) 1.6 × 10⁵ K
• D) 1.1 × 10⁴ K
• E) 3.6 × 10⁵ K

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