Question

The gases are at absolute temperature 300ºK and
350ºK respectively. The ratio of average kinetic
energy of their molecules is
(a) 7 : 6 (b) 6 : 7
(c) 36 : 49 (d) 49 : 36

Answer 1

Answer:

We know that kinetic energy of gas is given as KE=

2

3

KT

So,

KE

2

KE

1

=

T

2

T

1

⇒

350

300

=

7

6

The ratio of the average kinetic energy of their molecules is 6:7.

Hence, the correct option is A.