Changes of State: Phases and Phase Transitions

Melting is a physical change where a solid substance transforms into a liquid state upon the absorption of heat.

Latent Heat of Fusion is the energy required to overcome intermolecular forces and transform a solid into a liquid at its melting point.

Carbon Dioxide is a substance that undergoes sublimation, directly transitioning from a solid to a gas without passing through the liquid phase.

Condensation is the process where a gas transforms into a liquid, releasing heat and decreasing in volume.

The boiling point of a liquid is dependent on pressure. As pressure increases, the boiling point also increases.

Latent Heat of Vaporization is the energy required to overcome intermolecular forces and transform a liquid into a gas at its boiling point.

Water is a substance that undergoes deposition, directly transitioning from a gas to a solid without passing through the liquid phase.

Sublimation is the process where a solid directly transforms into a gas, bypassing the liquid phase.

The freezing point of a liquid is dependent on pressure. As pressure increases, the freezing point also increases.

Triple Point is the temperature and pressure at which the solid, liquid, and gas phases of a substance coexist in equilibrium.

Water is a substance that has a triple point at room temperature and pressure, meaning it can exist in all three phases simultaneously under these conditions.

Evaporation is the process where a liquid transforms into a gas, absorbing heat and increasing in volume.

The melting point of a solid is generally independent of pressure.

Critical Point is the temperature and pressure at which the liquid and gas phases of a substance become indistinguishable.

Carbon Dioxide is a substance that has a critical point at room temperature and pressure, meaning it can exist as a supercritical fluid under these conditions.