Question

The Dutch scientist Johannes van der Waals developed a useful equation to predict the behavior of real gases. In the van der Waals equation, what are the constants a and b, respectively?

a is a measure of how strongly the gas molecules attract one another, and b is a measure of the finite volume occupied by the molecules.

a is a measure of the random motion of gas molecules, and b is a measure of the volume of the container.

a is a measure of the finite volume occupied by the molecules, and b is a measure of how strongly the gas molecules attract one another.

a is a measure of the molecular mass of the gas molecules, and b is a measure of the finite volume occupied by the molecules.

Answer 1

The vanderwals equation is

(P + n²a/V²)(V-nb) = nRT

a and b are vanderWaals constants

The van der Waals constant b is a measure of the actual volume occupied by a mole of gas molecules; b has units of L/mol.

The magnitude of a reflects how strongly the gas molecules attract each other. the van der Waals constant a has units of L²-

So in the question the answer is option 1 and is

a measure of how strongly the gas molecules attract one another, and b is a measure of the finite volume occupied by the molecules.