What is the difference between "vapour" and "gas"?
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. The origin of vapor is presumably Latin with earlier roots in Ancient Greek. The origin of the word gas appears to be the Greek word chaos by way of Dutch:
General rules for deciding volatility - Chemistry Stack Exchange
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 …
Confusion between vapor pressure vs. vapor-liquid equilibrium
2024年9月22日 · We start with vapor which increases in pressure at constant T as it is compressed. At point D the substance begins to condense into liquid (therefore dew point ). The amount of liquid increases between D and B as described in Chet Miller's answer until at point B only liquid is present.
What is the differences between partial pressure and vapour …
The partial pressure of a gas is the pressure exerted by a gas in the volume occupied by a mixture of gases, while the vapor pressure of a gas is the pressure exerted by a gas over its condensed phase. Although : The vapor pressure that a single component in a mixture contributes to the total pressure in the system is called partial pressure.
evaporation - What is the difference between "smell/odor" and …
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.
What's the relationship between chemical polarity and vapor …
2016年2月27日 · The vapor pressure of a liquid is the equilibrium pressure of vapor above the liquid at a given temperature. Liquids with higher vapor pressures must have less strong forces holding the molecules together in the liquid phase, thus more of the molecules are able to escape the liquid and be in the vapor phase.
How to arrange substances in order of increasing vapor pressure?
To solve this problem, use Raoult's law. 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. We …
vapor pressure - What is the difference between volatility and ...
A measure of volatility is the vapor pressure. There is a very related term partial pressure. So if we think of air as being nitrogen and oxygen, then there is a partial pressure for nitrogen and a partial pressure for oxygen, and the sum of the two partial pressure is the actual pressure (the absolute pressure).
physical chemistry - Relationship between vapour pressure and …
2015年8月5日 · The air/water are at STP and are at equilibrium. So the total pressure of the gas phase (water + dry air) is 760 torr. 742 torr is dry air and 18 torr is the partial vapor pressure of water. The air/water mixture has 100% humidity which means that it is saturated with water, hence the term saturated vapor pressure. (In other words if the ...
Vapor pressure vs. ambient pressure - Chemistry Stack Exchange
2019年10月16日 · The way to understand the effect of the pressure of an inert gas (oxygen here assumed to be inert) on the vapor pressure of a liquid is to consider the effect of the extra pressure on the chemical potential of the liquid: $$\left(\frac{\partial \mu}{\partial P} \right)_T=V_m$$