090130_Quiz1_with_answers

090130_Quiz1_with_answers - Your Name . [ /6] Chem340...

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Your Name . [ / 6 ] Chem340 Physical Chemistry for Biochemists Quiz 1 Jan 30, 2009 Q1. Consider a gas mixture in a 2.00-L flask at 27.0°C, which contains 1.50 g H 2 , 1.50 g O 2 , and 1.50 g CO 2 . Assume that all behave as ideal gas, which gas has the highest partial pressure? Assume that the molar mass of H 2 , O 2 , CO 2 are 2.00 g, 32.00 g, 44.00 g, respectively. Choose one. a. H2, b. O2, c. CO2 d. All are the same Q2. The critical constants of methane are P c = 45.6 atm, V c = 98.7 cm 3 mol -1 . Choose all the correct equation(s) you can use to obtain the van der Waals parameters of the gas ( a , b ) and critical temp T C . (a) b = 3x98.7cm 3 mol -1 (b) a =45.6 atm x 27 x b 2 (c) b = 98.7cm 3 mol -1 /3 (d) 27 a = 45.6 atm x b 2 (e) 45.6 atm x 98.7 cm 3 mol -1 = nRT C Q3. Calculate the average (i) translational energy and (ii) rotation energy of one Ne molecules assuming that it is an ideal gas. Choose the closet from the choices (a- h) below and write the alphabet after (i) and (ii). Two correct answers are needed for a credit.
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This note was uploaded on 10/11/2009 for the course CHEM 340 taught by Professor Staff during the Spring '08 term at Ill. Chicago.

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