Combined

A gas sample often undergoes simultaneiuos changes in temperature, pressure, and volume. when this happens, three varibles must be dealt with at once. boyles law, chrles law, and gay lussac's law can be combined into a isngle expression that describes a reationship that is useful in such situations.

the combines gas law expresses the realtionship between pressure, volume, and temperature of a gas when the amount of gas is fixed. P1V1/T1=P2V2/T2

GIven: V1=50 L T2= 10C + 273 = 283K T1= 25C = 273 = 298K P1= 820 mm Hg P2= 650 mm Hg
 * PROBLEM:**A helium filled balloon has a volume of 50L at 25C and 820 mm Hg. What volume will it occupy at 650 mm Hg and 10C?

UNKNOWN; V2=??????

V2=(820mm Hg) ( 50 L) (283K) / (650 mm Hg) (298K)=59.9 L