Combined Gas Law warmup.notebook
February 27, 2014
Warm‐up 2/27/14
A weather balloon is filled with 2.5 L of helium at 23.0oC and 1.00 atm. What volume does the balloon have when it has risen to a point in the atmosphere where the pressure is 0.29 atm and the temperature is ­31.5oC?
What formula can we use when only number of particles of a gas is held constant?
Combined Gas Law
P1V1 P2V2
=
T1
T2
Combined Gas Law warmup.notebook
February 27, 2014
A weather balloon is filled with 2.5 L of helium at 23.0oC and 1.00 atm. What volume does the balloon have when it has risen to a point in the atmosphere where the pressure is 0.29 atm and the temperature is ­31.5oC?
(1 atm)(2.5 L)(241.5K)
= V2 = 7.0 L
(296K)(0.29atm)
At a deep­sea station in the Pacific Ocean, workers live in a highly pressurized environment. How many liters of gas at STP conditions must be compressed on the surface to fill their environment with 2.00x107 L of gas at 19.5 atm and 23.0oC?
(1.00 atm)(V1)
273K
V1 =
=
(19.5 atm)(2.00x107L)
296K
(19.5atm)(2.00x107L)(273K)
(1.00atm)(296K)
V1 = 3.60x108 L