Question

The average speed at T1K and most probable
speed at T2K of Co, gas is 9 x 10^4 cm/sec. The
values of T1, and T2 are
1) 2143 K; 1694 K
2) 1726 K ; 2126 K
3) 1684 K; 2143 K
4) 1684 K ; 3368K​

Answer 1

Answer:

Average speed =

(

πm

8RT

)

Most probable speed =

(

m

2RT

)

Average speed at T

1

K = MP speed at T

2

KforCO

2

(

πm

8RT

1

)

=

(

m

2RT

2

)

T

2

T

1

=

4

π

------(i)

Also for CO

2

u

mp

=

(

m

2RT

)

=9×10

4

=

44

2×8.314×10

7

×T

2

=9×10

4

By eq (1) We get

T

2

=2143K

T

1

=1684K

Hence answer is (C)