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What is the difference between vapour and gas? 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 lower vapor pressure (Taken from Wikipedia) But this doesn't seem to work--I recall that methanol is less volatile than ethanol I think you
How to calculate the vapour density of a mixture? Was it safe to assume that the amount of substance of mixture equals that of the amount of substance of both the gases? Amount of substance is additive, just like mass You have to be careful with volume, though So yes, it is safe to make that assumption I have to figure out the vapour density of the mixture I'm not sure you are starting with a safe question, i e if the vapour density
(At what temperature) can salt evaporate? - Chemistry Stack Exchange The vapor pressure of sodium vapor is approximately 1 08 E-27 Pascals or 1 08 E-32 Bar at 25 C or 298 15 K, slightly above room temperature Vapor pressure is so low that the saturated vapor density is 2 55 E-35 grams cu cm with 99 99 % ClNa and 0 01% Cl2Na2 dimer fraction in the vapor
how to determine the volatility of an organic compound using the . . . 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
Why does the pressure sharply increase when the liquid vapor . . . The equilibrium vapor pressure varies with temperature because of two factors - 1)kinetic energy of particles and 2) number density Both increase non-negligibly with temperature The surface of the liquid is not something that simply compresses a gas It also evaporates Without understanding this, one cannot distinguish between options B and C