Unformatted text preview: means that the initial pressure times the intial volume is equal to the final pressure times the final volume. In other words, P 1 V 1 = P 2 V 2 . Plugging in the provided variables you get V 2 = 50 gal. You can often just think through problems such as this. Since P dropped from sea level pressure (1atm) to 0.2 atm, that means it dropped by a factor of five. Therefore, V must go up by a factor of 5 to keep nRT constant. since the initial V was 10 gal, the final V must be 50 gal....
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 Fall '08
 Herron,S
 pH, sea level, initial pressure times

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