Borek said:Molar fraction of zero means there is no substance present, that's perfectly logical to me.
What you are saying is that you object to extending the relationship p = Px down to x = 0, even though at x = 0, the species is not present so that its partial pressure p is equal to zero ( p = 0). And somehow this objection makes sense to you (because it doesn't make sense to me). I'm totally in agreement with Borek.T Damen said:That is perfectly logical of course..
But imagine a P, xi plot for substance x in a mixture. At xi=0 the plot is not meaningful for describing substance x anymore cause substance x is not present anymore.
Simply put: a P, xi plot for a certain substance can only be plotted for values of xi where the substance is actually present.
Partial pressure refers to the pressure exerted by a single gas in a mixture, while mole fraction is a ratio of the number of moles of a specific gas to the total number of moles in the mixture. In other words, partial pressure is a measure of the amount of gas present, while mole fraction is a measure of the proportion of that gas in the mixture.
Partial pressure and mole fraction are related through Dalton's law of partial pressures, which states that the total pressure of a gas mixture is equal to the sum of the partial pressures of each individual gas in the mixture. This relationship can be represented by a graph, where partial pressure is plotted on the y-axis and mole fraction is plotted on the x-axis.
An increase in temperature will cause the molecules of a gas to have higher kinetic energy, leading to more frequent collisions with the walls of the container and an increase in pressure. As a result, the partial pressure vs mole fraction graph will shift upwards, showing an increase in both partial pressure and mole fraction for each gas in the mixture.
A partial pressure vs mole fraction graph can provide information about the composition of a gas mixture, as well as the individual partial pressures and mole fractions for each gas in the mixture. It can also be used to calculate the total pressure of the mixture using Dalton's law of partial pressures.
In industrial processes, a partial pressure vs mole fraction graph can be used to monitor and control the composition of gas mixtures in various systems. It can also be used to optimize reaction conditions by adjusting the partial pressures of each gas to achieve the desired mole fraction for a specific reaction.