Lab Proposal

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PART A:

1. Press the On/Off button to turn on the MeasureNet workstation 2. Press Main Menu, then press F2 Temperature, next press F1 Temperature vs. Time. 3. Half fill a 150-mL beaker with ice and water. Press calibrate to calibrate the temperature probe. When prompted, enter 0.0 *C as the actual temperature of the constant temperature bath (ice water). Press Enter. Insert the temperature probe in the ice water. Swirl the temperature probe until the temperature approaches and stabilizes near 0 *C (it may not read exactly 0 *C). Press Enter. 4. Remove the temperature probe from the ice water bath.

5. Press SetUp to establish scan parameters for the experiment. Press F1 to set the limits for the scan. Use the keys to move from min to max or from X to Y. An * marks the parameter selected to change at any given time. The Y-axis is for temperature. Set the min temperature 2-3 *C below the initial temperature of the substance that the probe is inserted into. Press Enter. 6. Set the max temperature 2-3 *C above the expected final temperature. Press Enter. 7. For example, to calibrate a cup calorimeter constant, the min temperature should be set to 15-18 *C, and the max temperature should be set to 70-75 *C. 8. The X-axis is for time. Set scan parameters from 0 seconds (min) to 250 seconds (max). This should be sufficient time for most experiments that require thermograms. (If the experiment is completed before 250 seconds elapses, press Stop at any time to end the experiment). 9. When all the parameters are entered, press Display to accept all values. The MeasureNet workstation is now ready to record a thermogram.

YOU CAN NOW MOVE ONTO THE STEPS TO RECORD AND DETERMINE THE CALORIMETER CONSTANT FOR EACH OF THE 4 PROVIDED CUPS.

1. Obtain two of the same cup types, in example two styrofoam cups, and a lid from your instructor or the lab stock room to serve as the calorimeter. Nest one cup inside the other to construct the...
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