What is the difference between "vapour" and "gas"?
Apr 19, 2021 · Vapor implies the existence of a condensed phase that is the source or destination of the gas, or with which the gas may be in equilibrium; while gas does not make such an assumption.
physical chemistry - What is the differences between partial pressure ...
Jan 23, 2014 · Vapor pressure or equilibrium vapor pressure is the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a …
thermodynamics - Why do we have water vapor at room temperature …
May 6, 2024 · 1 Think of molecules of water liquid escaping into vapor, and molecules of water vapor condensing into liquid. Both processes occur simultaneously, and an equilibrium is reached in a …
physical chemistry - Why is octane more volatile than water while ...
Oct 5, 2023 · 14 Octane has a boiling point of 120 °C. Water has a boiling point of 100 °C. The definition of boiling point is, "the temperature which the liquid substance's saturated vapor pressure equals the …
Vapor Pressure and Boiling Point - Chemistry Stack Exchange
May 16, 2020 · When a substance's multiple phases are in thermodynamic equilibrium with each other the vapor pressure is the pressure exerted by a vapor existing above a liquid surface. Vapor …
General rules for deciding volatility - Chemistry Stack Exchange
May 2, 2012 · In chemistry and physics, volatility is the tendency of a substance to vaporize. Volatility is directly related to a substance's vapor pressure. At a given temperature, a substance with higher …
what's the difference between gas and vapour? [duplicate]
Nov 28, 2022 · A vapor is a gas in possible equilibrium with its liquid [or solid] at a temperature below its critical T and either in contact with the liquid or at the equilibrium vapor pressure. If not at a sufficient …
Why does the vapour pressure not depend on the surface area and …
Apr 10, 2023 · I think that you forget about molecules re-entering the liquid from the vapour. Eventually the vapour will come into equilibrium with its liquid and so the rate of leaving the liquid and the rate of …
gas laws - Why can air accommodate more water when the air has a …
The liquid-vapor coexistence line of the phase diagram of water has a positive slope $\mathrm {d}P/\mathrm {d}T$. Humidity in air is a partial pressure of water vapor. If partial pressure of water is …
Question about vapor pressure in solids and liquids
Jun 14, 2023 · I've been reading about vapor pressure and it's a bit confusing. For example when water is in equilibrium between the solid and liquid phase, my textbook says that the vapor pressure is …