why does the amount of gas and temperature have to remain constant in order for pressure and volume to be directly proportional, or when testing the relationship between vol. and press.?
i'm reviewing for a test. ahhhhhh!
thank youuuuu.
2007-01-29 08:18:50 · 3 answers · asked by alexie. 4 in Science & Mathematics ➔ Chemistry
Because the temperture also affects the volume of the gas, so if you change the temperture AND the pressure and volume, there would be more than one variable changed that affects the result.
2007-01-29 08:25:41 · answer #1 · answered by leahjo_13 3 · 0⤊ 0⤋
Pardon: According to Boyle's Law, pressure and volume are INversely proportional. As the one goes up, the other must go down.
PV = nRT
P = pressure V = volume n = number of moles of the gas (this is the "amount" of the gas), R = gas constant (you have to look this up, or you have to be told by the teacher, for the units of P, V, and T used) T = absolute temperature (usually degK).
So P and V can only be inversely proportional (on the left hand side of the equation) if everything on the right side stays constant.
2007-01-29 08:40:08 · answer #2 · answered by steve_geo1 7 · 0⤊ 0⤋
I dont remember, but look it up on your internets (invented by Al Gore)
2007-01-29 08:26:18 · answer #3 · answered by Anonymous · 0⤊ 0⤋