The escape speed from the Earth is 1.12 × 104 m/s, so a gas molecule traveling away from Earth near the outer boundary of the Earth's atmosphere would, at this speed, be able to escape from the Earth's gravitational field.
1. At what temperature is the average speed of oxygen molecules equal to 1.12 × 104 m/s?
2. At what temperature is the average speed of helium atoms equal to 1.12 × 104 m/s?