Question

A gaseous mixture contains equal number of hydrogen and nitrogen molecules specific heat
measurements on this mixture at temperatures below 100 K would indicate that the value of
y (ratio of specific heats) for this mixture is
(1) 3/2
(2) 4/3​

Answer 1

1,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, /////////

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