How are pressure, volume and temperature related to the behavior of gases?

2 Answers | Add Yours

enotechris's profile pic

Posted on

Pressure and volume of a gas are inversely related.  As one goes up, the other goes down, and vice-versa.  Pressing down on a bicycle tire pump illustrates that by decreasing the volume, squeezing the air into a smaller space, the pressure increases, and forces it through the hose into the tire.  This inverse relationship is summarized by

Pressure = 1/Volume   and   Volume = 1/Pressure  or

P= 1/V  and V = 1/P

This relationship can be summarized as the pressure times volume of initial conditions is equal to the pressure times volume of the final conditions, or

(Pressure 1)(Volume 1) = (Pressure 2)(Volume 2)

Adding the variable of temperature causes the volume and pressure to increase or decrease as the temperature increases or decreases.  The formula to describe that is a bit more complex, including n as the number of moles of the gas and R which is the gas constant:

(Pressure)(Volume) = (number of moles)(gas constant)(temp)

PV= nRT

 

revolution's profile pic

Posted on

Their relationship is inverselly proportionated in some way, and affects the gas the same way.

We’ve answered 323,932 questions. We can answer yours, too.

Ask a question