What is the relationship between the vapor pressure of a chemical substance and its volatility?
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What is the relationship between the vapor pressure of a chemical substance and its volatility? The higher the partial pressure, does that mean its relative volatility is lower? If the pressure of the mixture inside the container remains constant, how does the volatility of a certain component change when it is diluted? I hope everyone will actively participate in the discussion.
In a gas mixture contained in any container, if no chemical reactions occur between the various components, each gas is distributed evenly throughout the entire container, and the pressure it exerts is the same as the pressure it would exert if it occupied the entire container by itself. In other words, the pressure of a certain amount of gas in a container of fixed volume depends only on temperature. Dalton summarized these experimental facts and arrived at the following conclusion: the partial pressure of a gas in a gas mixture is equal to the pressure it would exert if it occupied the entire container by itself ； The total pressure of a gas mixture is equal to the sum of the partial pressures of its individual gases; this is the law of partial pressure.
For ideal solutions, the relative volatility is related to the vapor pressure of the pure components; the higher the vapor pressure of a component, the greater its volatility!