Van der Waals Equation

Which of the following is the correct correction for intermolecular forces in Van der Waals equation?

• (V-nb)

• (P + n²a / V²)

• RT

• (RT)^-1

The van der Waals equation is a modification of ideal gas equation. Which of the following factor is not accounted for the modification?

• Volume of gas particles.

• Attractive forces between particles.

• Position of the particles.

In van der Waals equation, pressure correction is due to force of attraction between molecules.

• True

• False

The value of constant 'a' in van der Waals equation for various gases are given below:

Nitrogen gas, N₂= 1.390 L² atm mol^-2

Oxygen gas, O₂ = 1.360 L² atm mol^-2

Ammonia gas, NH₃ = 4.170 L² atm mol^-2

Methane gas, CH₄ = 2.253 L² atm mol^-2

Arrange these gases in the order of decreasing strength of intermolecular forces.

• NH₃ < CH₄ < N₂ < O₂

• NH₃ > CH₄ > N₂ > O₂

• O₂ < N₂ < CH₄ < NH₃

• O₂ > N₂ > CH₄ > NH₃

The value of constant 'a' in van der Waals equation for various gases are given below:

Nitrogen gas, N₂= 1.390 L² atm mol^-2

Oxygen gas, O₂ = 1.360 L² atm mol^-2

Ammonia gas, NH₃ = 4.170 L² atm mol^-2

Methane gas, CH₄ = 2.253 L² atm mol^-2

Arrange these gases in the order of most ideal to least ideal gas.

• NH₃ < CH₄ < N₂ < O₂

• NH₃ > CH₄ > N₂ > O₂

• O₂ < N₂ < CH₄ < NH₃

• O₂ > N₂ > CH₄ > NH₃

From the van der Waals constant 'b' for H₂, CO₂ and N₂ gas, which of the gas have the largest volume?

Hydrogen gas, H₂ = 0.02661 L mol^-1

Carbon dioxide, CO₂ = 0.04267 L mol^-1

Nitrogen gas, N₂ = 0.03913 L mol^-1

• Hydrogen gas. H₂

• Carbon dioxide, CO₂

• Nitrogen gas, N₂