Combined+Gas+Law+S.+Lindo

Combined Gas Law This law is a combination of all three of the laws. This law states that pressure and volume is directly proportional to the absolute temperature. The equation for this law is: P1V1/T1= P2V2/T2

**Question:** A helium-filled balloon has a volume of 50.0L at 25C and 1.08atm. What volume will it have at 0.855atm and 10.0C? Then transfer L into ml. **Given:** V1 of He = 50.0L T1 of He = 25C + 273 = 298K T2 of He = 10C + 273 = 283K P1 of He = 1.08atm P2 of He = 0.855atm **Unknown:** V2 of He in L  V2 of He in ml  Equation: P1V1/T1 = P2V2/T2 V2= P1V1T2/ P2T1 V2 = (1.08atm) (50.0L He) (283K) = 15282L = **//59.9 L or 60.0 L of He//** ___________________________ __________     (0.855atm)(298K) 254.79 60.0L x 1000ml = 60000ml **//of He//** __________      1L

Gas Law Teaching Wiki ~ S. Lindo