# quiz2 - 1 of 4 pages NAME BE.011/2.772 Exam 2 19 March 2004...

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1 of 4 pages NAME_____________________________________ BE.011/2.772 Exam 2 19 March 2004 Conversions & Constants k (boltzman constant) = 1.38017 x 10 -23 J/K Gas Constant R = N k = 8.3144J/K-mol Avagadro’s Number = 6.022 x 10 23 1 atm = 101,325 N/m 2 1 N = 1 J/m 1 J = 0.23901 cal 1. Home soda seltzer makers were popular in the Czech Republic during the early-mid 20 th century, and can now be purchased from various high-end purveyors of kitchenware. To make seltzer, a heavy-duty bottle (to withstand pressure) is filled with water, leaving a little air space on top. A charger/dispensing apparatus is screwed on to make a tight seal. A metal canister containing 10 cm 3 of compressed CO 2 is placed in a holder and screwed onto the charger/dispensing apparatus, piercing a metal membrane on the CO 2 canister and releasing CO 2 into the bottle, where approx 50cm 3 air space is available. a. If the process occurs adiabatically, as expansion of the gas into the new volume, what is the temperature of the gas at the end of the process? You may consider that the air initially present in the bottle does not contribute to the final state; i.e., you may consider this adiabatic expansion of the CO

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quiz2 - 1 of 4 pages NAME BE.011/2.772 Exam 2 19 March 2004...

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