Combined+K.Raithel

=The Combined Gas Law= There is a law created that combines Boyle's, Charles's and Gay-Lussac's laws together into one simple expression. The combined gas law expresses the relationship between pressure, volume, and temperature of a fixed amount of gas.

PV/T=k P1V1/T1=P2V2/T2
 * The Math**


 * Example:** A helium filled balloon has a volume of 25.0 L at 30 degrees C and 2.0 atm. What volume will it have at 1.2 atm and 15 degrees C?


 * Solution:**
 * 1) Rearrange the equation to get V2 by itself. V2=P1V1T2/P2T1
 * 2) Substitute the known values for each. (2.0 atm)(25.0 L)(288 K)/(1.2 atm)(303 K)= 39.60 L He

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