13. The escape speed from Earth is 11.2 km/s. At what temperature would 11.2% of the oxygen molecules in the Earth's atmosphere have speeds greater than the escape speed? Use the table provided.

Table 1. Fraction f of the molecules in an ideal gas that have a kinetic energy greater than αKav, where Kav is the average kinetic energy.
αf
0.50 0.685
1 0.392
2 0.112
3 0.029
4 0.0076
5 0.0018
10 1.4 × 10–6
15 9.4 × 10–10
20 5.9 × 10–13
30 2.4 × 10–19
40 7.7 × 10–26
50 3.1 × 10–32
100 1.1 × 10–64

A. 1.2 × 104 K

B. 0.8 × 105 K

C. 1.6 × 105 K

D. 2.4 × 105 K

E. 3.2 × 105 K

F. 6.4 × 105 K