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Unformatted text preview: CH302H. Sp08, EXAM 1, Page 3 / I NAME 5 1 I #l. A professor suggests to his TA a new experiment for the freshman lab using ethanol as the liquid filling a barometer tube. Recall that the height of liquid supported in such a tube at 1 atm is 760mm (0.76 m) when the liquid is mercury. The density of mercury is roughly 14 gem" and that of ethanol is about 0.8 g-cm". Estimate how high a column of ethanol would be supported in a barometer tube at 1 atm pressure, and so, show that this professor probably didn't think very hard about where he would conduct this lab. (HINT: v y o u think that you need an equation that is not given to you, ask yourself what is varying in problem.) GI ~ o b 1 1 4 0 &&/ ; A A b-rwf~ kr - Q ~ - - ~ - - - - : ~ v c J C L . L ( ? I , - - #2. and wants to heat it up to double the volume (at constant pressure). The student calculates from the ideal gas law that the final temperature he needs is 50C. Where did he go wrong? #3. A student fills ten (10) initially evacuated 1 L flasks using a tank of helium that has an initial volume of 10 L and initial pressure of 20 atm. Assuming that the temperature is always the same in all the flasks and tank, what is the pressure in the tank after filling the 10 flasks, if each is filled to a pressure of 1 atm? atm?...
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This note was uploaded on 10/27/2008 for the course CH 302H taught by Professor Rossky during the Spring '08 term at University of Texas at Austin.
- Spring '08