Entropy - Entropy April 8th, 2008 Lab Section 2107 Course...

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Entropy April 8 th , 2008 Lab Section 2107 Course Number 4103 Simon Duri Amanda Quella
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Trial Two Time Temperature (Celcius) Time Temperature (Celcius) 0 29.5 0 29.5 15 29.5 15 29.5 30 29.5 30 29.5 45 29.5 45 29.5 90 29.5 90 29.5 105 27.0 105 28.0 120 26.0 120 27.0 135 25.5 135 26.5 150 25.5 150 26.0 165 25.5 165 26.0 180 25.5 180 26.0 195 25.5 195 26.0 210 25.5 210 26.0 245 26.0 Purpose : to figure out the entropy change for a reaction between urea and water. Procedure : 1. 3.088 grams of urea were measured out. 2. The urea was then placed into a 10.0 mL graduated cylinder 3. A very small amount of water was added to the urea until it was dissolved 4. The volume was measured to be 5.90 mL and the concentration was calculated 5. This procedure was repeated 6. Amounts of urea were determined so that the concentration would equal 1.0 M 7. The temperature of H 2 O was measured every 15 seconds for 90 seconds 8. The solid urea was added and stirred vigorously until it was dissolved 9. The temperature was recorded every 15 seconds until it stopped changing
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Entropy - Entropy April 8th, 2008 Lab Section 2107 Course...

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