CHEM 202 Lecture Notes - Lecture 2: Torr, Water Gas, Relative Humidity
Document Summary
Entropy favors gas phase; intermolecular forces favor solid phases. Entropy/enthalpy phase differences: solid-liquid small gap; liquid-gas large gap. Vaporization/condensation-(liquid/gas phase: vaporization in open system (like a glass of water, or a puddle) is what we usually equate to evaporation. As mentioned last time, liquid particles are in constant motion as they move through the liquid phase. Those on the surface, ie, the liquid gas interface have an additional option if they have enough energy to overcome their if forces, the particle can leave the liquid phase and enter the gas phase. The rate of condensation initially increases as more gas molecules become present in the gas phase. Eventually the rate of condensation will equal that of the rate of vaporization. The concertation of the gas and liquid phases no longer change. This is equilibrium. (l) (g: two approaches can describe the balanced associated with the equilibrium: Kinetically the rate of evaporation and condensation are equal.
