At what temperature will the rms speed of oxygen molecules become just sufficient for escaping from the; Earth’s atmosphere ?
(Given : Mass of oxygen molecule $$(m) = 2.76 \times 10^{-26} kg)$$
Boltzmann's constant $$k_{B}=1.38 \times 10^{-23} J K^{-1}$$

A

$$1.254 \times 10^{4}$$ K

B

$$5.016 \times 10^{4}$$ K

C

$$8.360 \times 10^{4}$$ K

D

$$2.508 \times 10^{4}$$ K