Question

regarding the Vander waals constant which of the following is/are correct ?​

Answer 1

Answer:

CHEMISTRY

Which of the following are correct statements :

This question has multiple correct options

January 17, 2020avatar

Sharanya Tahlani

SHARE

ANSWER

(A) Vander waals constant 'a' is a measure of attractive force

The van der waals constant 'a' represents the magnitude of the attractive forces present between gas molecules. Higher is the value of 'a', more easily the gas can be liquefied.

(B) Vander waals constant 'b' is also called co-volume or excluded volume

The van der waals constant 'b' represents the effective size of gas molecules. Higher is the value of 'b', larger is the size and smaller is the compressible volume and more difficult it is to liquefy the gas.

(C) 'b' is expressed in Lmol

−1

The unit of b is same as the unit of molar volume.

(D) 'a' is expressed in atm L

2

mol

−2

The unit of a is equal to

(Moles)

2

pressure×(volume)

2