Question

In Vander Waal's equation (P+ a/v^2) (V - b) = RT, what are the dimensions of constants 'a' and 'b'? ​

Answer 1

Step-by-step explanation:

(P+ a/v^2) (V - b) are two factors in parentheses. These factors which represent physical quantities and are determined by subtraction. You can’t subtract unless both terms have the same dimensions.

`a/v^(2)` has the same units as p

a=p
`v^(2)` =

`[ML^(-1)T^(-2)] [L^(6)] = [ML^(5)T^(-2)]`

v has the same units as b

B =
`[L^(3)]`