Day: July 7, 2016

Partial pressure

Partial pressure

Partial pressure

07/07/16

“How can we quantify the different pressures contributed by different gases in a container?”

Let’s think about something. We know that a mixture is a combination of different gases held within a given volume. We also know that different gases are made up of different molecules. And we also know that different molecules come in different sizes and forms, giving them different quantitative properties. And one of these different quantitative properties happens to be pressure. So therefore, gases of different chemical makeup will have different pressures. So how can we mathematically determine the pressure that each gas contributes to the mixture? Well, this is actually one of the easiest things to solve for in chemistry. All one has to is find the total percentage contribution to the mixture that one of the gases contribute, then multiply that concentration by the total pressure, and one can get the amount of pressure that the individual gas contributes. Scientists and Engineers have termed this the partial pressure of the gas.