Kinetic theory of gases.

Question

A gaseous mixture contains equal number of hydrogen and nitrogen molecules.Specific heat measurement on this mixture at temperatures below 100K would indicate that the value of ¥(ratio of specific heats) for this mixture is

(a) 3/2      (b) 4/3.     (ć) 5/3    (d) 7/5

Answer 1

At temperature below 100K the diatomic gas behaves as monoatomic gas and has three degrees of freedom only. Rotational degrees of freedom is not exhibited. So the value of sp.heat (¥) becomes 5/3 .

Hence option (c) should be accepted.

Here is an information for diatomic gases.

Comments

Your answer is incorrect.Correct answer is (ć) 5/3.but I want it's explanation.

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Necessary corrections made