Heat and Thermodynamics 4 Question 25

27. The average translational kinetic energy of O2 (molar mass 32) molecules at a particular temperature is 0.048eV. The translational kinetic energy of N2 (molar mass 28) molecules in eV at the same temperature is

(1997, 1M)

(a) 0.0015

(b) 0.003

(c) 0.048

(d) 0.768

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Solution:

  1. Average translational kinetic energy of an ideal gas molecule is 32kT which depends on temperature only.

Therefore, if temperature is same, translational kinetic energy of O2 and N2 both will be equal.



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