Lab Report 07 Phase Changes

Lab Report 07 Phase Changes - Experiment: Required...

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Experiment: Required Equipment Styrafoam cups Ice Water Temperature probe Heating plate Thermometer Liquid N 2 Crushed dry ice Two pairs of styrafoam cups were obtained and their masses recorded.  250 mL of water  was heated up to 55  o C to 65  o C, and 60 mL of it was taken and put into one of the pairs of the  styrafoam cups.  20 grams of ice needed to be weighed and put into the second pair of styrafoam  cups.  The temperature probe was put into the styrafoam cup with the water, and the initial  temperature of the water was recorded.  The ice was added to the water while the temperature  probe was still in there, and after all the ice melted the final temperature was calculated.  This part  of the experiment was replicated three times, and the average of all three trials was obtained. The two pairs of styrafoam cups were reused in the second part.  250 mL of water was  heated up between 55  o C to 65  o C, and 60 mL of it was separated, its mass was taken, and it was  placed in two of the styrafoam cups.  In the other styrafoam cups 40 grams of liquid nitrogen was  measured and recorded.  The temperature probe was put in the styrafoam cup pair with the hot  water, and the initial temperature was recorded.  The liquid nitrogen was quickly added to the hot 
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This lab report was uploaded on 04/07/2008 for the course CHEM 184 taught by Professor Hierl during the Fall '07 term at Kansas.

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Lab Report 07 Phase Changes - Experiment: Required...

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