As you see, Robert Boyle gave us a way to calculate the volume of a gas when the pressure on a closed, but flexible system is changed. His formula specifically states that the volume of a gas, under conditions of stable temperature and amount of gas, is inversely proportional to pressure. Thus, if the pressure is doubled, the volume of the gas will be cut in half, etc. The formula for this law is:
P1V1 = P2V2
whereas, P1 is the original or starting pressure, P2 is the final pressure, V1 is the starting volume and V2 is the final volume. We can use this formula to solve for either one of the four variables if the other three are known, for example:
V2 = P1V1 / P2
Take care in using Boyle's Law that you remember that the temperature or amount of gas (moles or mass) cannot change at the same time!
thats boyles law now charles this will help all peeps out ...
. Charles discovered a way for us to understand the relationship between the volume of a gas and its temp- erature. After a series of experiments, he concluded that the volume of a gas is DIRECTLY proportional to its absolute temperature. (V1 / T1 = V2 / T2) . This works ONLY if any temperature given is first converted to absolute (Kelvin) temperature and assuming that the amount (moles or mass) of gas and the pressure are held constant. It has also been noticed that the pressure changes if the volume is held constant and the temperature is changed. Click here < for a really neat site which will actually allow you to see what happens to the pressure in a closed container (volume held constant) when the temperature is changed. Note that the temperature must be in Kelvin when working Charles' Law problems!
The Combined Gas Law contains six variables, which includes all of the gas laws on this page except Dalton's Law. It combines the laws of Boyle, Charles and Gay-Lussac into one formula that can be used to solve for any one of the variables when the others are known. The formula is:
P1V1 / T1 = P2V2 / T2
by transposition like you all learned in high school you can now work out gas volumes against charge temp