Multiple Choice
The average speed of hydrogen molecules (H2) in Earth's atmosphere is below the calculated escape speed from Earth (11.2 km/s) . So, is hydrogen gas retained in Earth's atmosphere?
A) Yes. Under these conditions H2 must be retained.
B) No. Escape speed depends on the mass of the escaping object. Hydrogen is the lightest molecule, thus its escape speed is well below 11.2 km/s.
C) No. Escape speed depends on the mass of the escaping object. Hydrogen is the lightest molecule, thus its escape speed is well above 11.2 km/s.
D) No. While the average speed of H2 is below the escape speed, there will be some H2 molecules with speeds above escape speed-and these will escape.
Correct Answer:
Verified
Correct Answer:
Verified
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