Question

A gaseous mixture contains equal number of hydrogen and nitrogen molecules.Specific heat measurements on this mixture at temperature below150 k indicate that the value of for the mixture is

Answer 1

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3 by 2 is the answer

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Answer 2

Thus the ratio of cp / cv is v = 7 /5

Explanation:

Degree of freedom of mixture of gases.

f = n1f1 + n2f2 / ( n1 + n2)

We know that n1 = n2

and f1 = f2 = 5

Now  

f = n x 5 + n x 5 / 2n

f = 5

v = (1 + 2 / f)

v = 1 + 2 / 5

v = 7 /5

Thus the ratio of cp / cv is v = 7 /5