Heat and Thermodynamics 4 Question 25
27. The average translational kinetic energy of $O _2$ (molar mass 32) molecules at a particular temperature is $0.048 eV$. The translational kinetic energy of $N _2$ (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:
- Average translational kinetic energy of an ideal gas molecule is $\frac{3}{2} k T$ which depends on temperature only.
Therefore, if temperature is same, translational kinetic energy of $O _2$ and $N _2$ both will be equal.
