2 EXPERIMENTAL PROCEDURE i Measure the mass of the empty inner cup of the

2 experimental procedure i measure the mass of the

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introductory page allowed us to calculate the rest of our results. 2. EXPERIMENTAL PROCEDURE i. Measure the mass of the empty inner cup of the calorimeter ii. Fill it with 250 ml of cold water iii. Measure mass of the inner cup and water together and then place it into the calorimeter iv. Figure out water equivalent (add mass of water in calorimeter to it) v. Place the lid with a heating coil and a stirrer on the calorimeter
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vi. Turn on power supply and adjust output voltage so that ammeter reads approximately 1.5 amps vii. Record measured voltage level from the voltmeter; place thermometer on water and record initial temp; turn power supply on viii. Start stopwatch; leave power supply on for 25-30 minutes ix. Record the ammeter and voltmeter every two minutes while stirring water occasionally so that the heat from coil is not localized x. Remove power supply, record time, stir water once more and record the final temperature 3. RESULTS Time (minute) Voltage (V) Current (A) 0 6.5 1.5 2 6.4 1.5 4 6.4 1.5 6 6.4 1.48 8 6.5 1.5 10 6.5 1.5 12 6.5 1.5 14 6.5 1.5 16 6.5 1.56 18 6.5 1.5 20 6.5 1.5 22 6.5 1.53 24 6.5 1.5 26 6.5 1.5 28 6.5 1.5 30 6.5 1.5 Mass of the empty inner cup of the calorimeter = 56.90 g Mass of the inner cup containing water = 34.60 g Effective mass of water from step 4 in the procedure = 37.1 g Voltage V = 6.5 Current I = 1.5 Power = 9.75 J/s Time = 1800 s Total electrical energy provided to the system = 17,550 J
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  • Spring '17
  • HalinaOprychal
  • Energy, Heat, power supply, total electrical energy, inner cup, PHYS 103A Lab

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