Phase Changes and Vapor Pressure

These flashcards cover key concepts related to phase changes and vapor pressure as discussed in the lecture.

Vapor Pressure

The pressure of gas above a liquid in a closed container, influenced by attractive forces.

Phase Change

Transition between different states of matter: solid, liquid, and gas.

Boiling

The process where the vapor pressure of the liquid matches atmospheric pressure.

Triple Point

The condition where all three phases of a substance (solid, liquid, gas) coexist in equilibrium.

Supercritical Point

A state beyond the critical point where distinct liquid and gas phases do not exist.

Sublimation

The phase change from solid directly to gas without passing through the liquid state.

Standard Pressure

The pressure equivalent to 1 atm, 101.3 hPa, 760 Torr, 71.0 mmHg, or 14.7 psi.

High Vapor Pressure

Occurs when attractive forces between particles are low, leading to more particles escaping into the gas phase.

Low Vapor Pressure

Occurs when attractive forces between particles are high, preventing particles from escaping into the gas phase.

Critical Point

The temperature and pressure at which a gas and liquid become indistinguishable.