GasFlüssigkeitswechsel

GasFlüssigkeitswechsel, often abbreviated as GFW, refers to a phase transition process where a substance changes from a gaseous state to a liquid state, or vice versa. This phenomenon is a fundamental concept in thermodynamics and chemistry, driven by changes in temperature and pressure. The specific conditions required for a GasFlüssigkeitswechsel to occur are determined by the substance's phase diagram, which illustrates the different phases a substance can exist in under various conditions.

When a gas cools down or its pressure increases, its molecules lose kinetic energy or are forced closer together, respectively. If these changes are significant enough, the intermolecular forces become dominant, causing the gas to condense into a liquid. This process releases latent heat, known as the heat of condensation. Conversely, when a liquid is heated or its pressure decreases, its molecules gain enough energy to overcome intermolecular forces and escape into the gaseous phase. This is called vaporization or evaporation, and it requires an input of energy, the latent heat of vaporization. The terms condensation and vaporization are commonly used when referring to the transition between gas and liquid states.