Unformatted text preview: proportional to pressure. Explanation: Dalton’s Law states that the total pressure exerted by a mixture of ideal gases is the sum of the partial pressures of those gases: P total = P A + P B + P C + ... under constant V , T . 009 (part 1 of 1) 12 points 0.65 moles of O 2 originally at 85 ◦ C is cooled such that it now occupies 8.0 L at 40. ◦ C. What is the Fnal pressure exerted by the gas? 1. 2.09 atm correct 2. 3.12 atm 3. 2.39 atm 4. 0.27 atm 5. 0.87 atm 6. Not enough information is given. Explanation: NOTE: the 85 ◦ C is not needed in the calculation. That temperature could have been ANY temperature. T = 40 ◦ C + 273 . 15 = 313 . 15 K V = 8 . 0 L n = 0 . 65 mol Using the Ideal Gas Law, P V = n R T P = n R T V = (0 . 65) (0 . 082058) (313 . 15) 8 . = 2 . 09 atm...
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This note was uploaded on 01/23/2011 for the course CH 301 taught by Professor Fakhreddine/lyon during the Spring '07 term at University of Texas.
 Spring '07
 Fakhreddine/Lyon
 Chemistry, Mole

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