Behaviour of Real Gases

The video explains the differences between ideal and real gases, highlighting how real gases deviate from ideal behavior under certain conditions. It introduces the concept of compressibility factor Z and explains how it measures deviations from ideal gas behavior. The video also covers the van der Waals equation, which accounts for intermolecular forces and the volume occupied by gas molecules, providing a more accurate description of real gas behavior.

Which of the following conditions make a gas behave ideally according to Boyle's Law?

• High pressure and low temperature

• Low pressure and high temperature

• High pressure and high temperature

• Low pressure and low temperature

What does a compressibility factor greater than 1 indicate about a gas?

• The gas has no intermolecular forces

• The gas behaves exactly like an ideal gas

• The gas is less compressible than an ideal gas

• The gas is more compressible than an ideal gas

At what temperature does a real gas obey the ideal gas law over a range of pressures?

• Critical temperature

• Boyle's temperature

• Room temperature

• Absolute zero

What is the significance of the constant 'B' in the van der Waals equation?

• It accounts for the volume occupied by gas molecules

• It is the ideal gas constant

• It represents the pressure correction

• It is the measure of intermolecular forces

How does the van der Waals equation modify the ideal gas equation?

• By assuming no intermolecular forces

• By adding a temperature correction term

• By including constants for pressure and volume corrections

• By removing the volume term

What does the van der Waals constant 'a' represent?

• The ideal gas constant

• The temperature of the gas

• The size of gas molecules

• The strength of intermolecular forces

Why do real gases deviate from ideal behavior at high pressures?

• Because the volume of gas molecules becomes negligible

• Because pressure decreases

• Because intermolecular forces become significant

• Because temperature increases