G AS L AWS Chapter 2 Section 4

D IRECTLY P ROPORTIONAL A graph of two variables is a straight line passing through the origin. As X so does Y X Y

V ARY I NVERSELY A graph of two variables that form a curve As X so does Y X Y

V I P BOYLE VOLUMEVOLUME INVERSEINVERSE PRESSUREPRESSURE Temperature remains constant As Pressure Decreases, Volume Increases As Pressure Increases, Volume Decreases

E XAMPLE OF V I P B OYLE

C HARLES D IREC TV DIRECTDIRECT TEMPERATURETEMPERATURE VOLUMEVOLUME Pressure remains constant As Temperature Increases, Volume Increases As Temperature Decreases, Volume Decreases

E XAMPLE OF D IREC TV A balloon filled with gas at room temperature After balloon lowered into liquid nitrogen (-196°C) Balloon shrinks as gas volume decreases When removed from nitrogen, the gas warms and balloon expands.

P RESSURE & T EMPERATURE L AW Volume remains constant As Volume Increases, Pressure Increases As Volume Decreases, Pressure Decreases