Combined.morris.goose

=__**Combined Gas Law**__= = = A gas sample goes through changes in temperature, pressure, and volume all at the same moment. When this happens, three variables have to be used at once. Boyle's Law, Charles Law, and Gay-Lussac's Law can be combined into one equation! The Combined Gas Law expresses the relationship between pressure, volume, and temperature of a fixed amount of gas.

__**Equation:**__
P 1 V 1 /T 1 = P 2 V 2 /T 2

Note: P 2 and T 2 are usually at STP, 0 ° C, and 1atm.

__**Example Problem:**__
__**Q:**__ __Given:__ V 1 =60L P 1 =2atm T 1 =300 ° K P 2 =4atm T 2 =280 ° K

__Unknown:__ V 2 =?

__**A:**__ 1) Write down formula: P 1 V 1 /T 1 = P 2 V 2 /T2

2) Plug in Given info: (2atm) (60L) /(300 ° K) = (4atm)V 2 /(280 ° K)

3) Simplify: 0.4(atm)(L)/( ° K) = (4atm)V 2 /(280 ° K)

4) Use Algebra, simplify, and you're done: 28L

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