Question

:7. The Vander Wall equation for ‘n’ moles of a real gas is(P + a) (v - b) = nRT, where P is pressure, V is volume, T is absolute temperature, R is molar gas constant and a, b, c are Vander walls constants the dimension formula for ab is​

Answer 1

Answer:

Since, the dimensions of P must be same as

V

2

a

,

Hence,

L

6

[a]

=[ML

−1

T

−2

]

[a]=[ML

5

T

−2

]

Also, dimension of b must be same as that of V. Hence, [b]=L

3

.

Thus, [ab]=[ML

8

T

−2

]

Answer 2

Answer:

the dimension formula of 'a' is same as that of P and of 'b' is same as that of V.

Explanation:

only like terms can add and subtract.

hope it will help you !!