2021年4月19日 · 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.

2022年11月30日 · What is the difference between "smell/odor" and "vapor" of a substance? It is assumed that the vapor of a given compound/element is the gas phase of the same pure compound/element. By condensing the vapor, you can obtain the same stuff in liquid or solid form. Smell on the other hand is a human/animal perception.

2015年8月5日 · I need clarity on saturated vapour pressure in a closed system at equilibrium. How does saturated vapour pressure relate to vapour pressure?

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 closed system.

2012年5月2日 · 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 vapor pressure vaporizes more readily than a substance with a lower vapor pressure. (Taken from Wikipedia) But this doesn't seem to work--I recall that methanol is less volatile …

Vapor pressure is the physical property that expresses a compound's volatility at a given temperature, and the enthalpy of vaporization describes the temperature dependence of the vapor pressure. For some compounds, like water, there are tables and formulae readily available for determining the vapor pressure at different temperatures.

In Raoult's law, the vapor pressure of a fluid is lowered proportionally with the mole fraction of solute particles in the fluid. You know the formula, but you only need it if you want to calculate the actual resulting vapor pressure.

2022年12月2日 · But in the same question, they provide two vapor (saturated) pressures for toluene and benzene. Question: If the intermolecular forces of toluene and benzene are equal, how do they have different vapor pressure?

Evaporate is a phase change from liquid to gas without changing the molecule itself (or the atoms is the liquid is atomic). Volatility is essentially the tendency of a liquid to evaporate. So a highly volatile liquid would show a great tendency to evaporate. A measure of volatility is the vapor pressure. There is a very related term partial ...

I’m a bit confused on why higher elevations/decreased atmospheric pressure wouldn't affect the vapor pressure of a liquid-or have a negligible affect on vapor pressure. With decreased atmospheric pressure, boiling point decreases, and a decrease in BP would increase vapor pressure. So isn’t atmospheric pressure changing the vapor pressure?