5. +-1 points SerCP 10 10P.039.wi What is the average kinetic energy of a molecu

Question

5. +-1 points SerCP 10 10P.039.wi What is the average kinetic energy of a molecule of oxygen at a temperature of 410 K? My Notes Ask Your Teacher Need Help? 1·Reed. I waehir il My Notes Ask Your Teacher 6. 2 points SerCP10 10 P.043. At what temperature would the rms speed of carbon monoxide molecules equal the following speeds? (Note: The mass of a carbon monoxide molecule is 4.65 x 10-26 kg.) (a) the escape speed from Earth, 1.12 x 104 m/s (b) the escape speed from the Moon, 2.37 × 103 m/s Need Help? Enid"

Explanation / Answer

5] Average kinetic energy =

E = (3/2)kT

=> E = 1.5 x 1.38 x 10-23 x 410 = 8.487 x 10-21 J

6]

E = (3/2)kT

and E = (1/2)mv2

a] for the escape speed from Earth:

(1/2)(4.65 x 10-26)(1.12 x 104)2 = 1.5(1.38 x 10-23)T

=> T = 140892.75 K

b] for the escape speed from Moon:

(1/2)(4.65 x 10-26)(2.37 x 103)2 = 1.5(1.38 x 10-23)T

=> T = 6308.837 K.

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