Real Gases and Liquids

Flashcards about real gases, liquids, and intermolecular forces (IMFs)

Under what conditions do real gases behave most ideally?

Low pressure and high temperature

Why do gases behave ideally at low pressures?

At low P, there are fewer collisions so particles spend less time close to each other, meaning IMFs are less important

Why do gases behave ideally at high temperatures?

The faster particles move, the less they “feel” the IMFs

What is Boiling Point (BP)?

Temperature at which molecules in the bulk liquid can break free from their neighbors into the gas phase

What is Vapor Pressure (VP)?

Pressure exerted by a gas in equilibrium with its liquid phase

What type of intermolecular attractions result in high vapor pressures?

Weak intermolecular attractions

What is Surface Tension?

Intermolecular attractions cause the surface of a polar liquid to tighten like an elastic film.

What is Viscosity?

A measure of a liquid’s resistance to flow. Liquids with strong intermolecular forces have high viscosity.