Hess's_law_LAB[1]

Hess's_law_LAB[1] - Hess's Law PURPOSE: To measure the heat...

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Hess’s Law
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PURPOSE: To measure the heat released by three reactions using a Styrofoam cup calorimeter. HYPOTHESIS : If the heat released by the two reactions are added together then that will equal to the heat released by the other reaction because the Hess’s Law states so. MATERIALS: LabPro or CBL 2 interface 50 mL of 1.0 M NaOH 50 mL of 1.0 M HCl 100 ml of 0.50 M HCl 100 mL of water Styrofoam cup TOOLS: TI Graphing calculator Data Mate program Temperature Probe 4.00 grams of solid NaOH Ring stand Utility clamp Stirring rod 250-mL beaker PROCEDURE: 1. Obtain and wear goggles. 2. Plug the Temperature Probe into Channel 1 of the LabPro or CBL 2 interface. Use the link cable to connect the TI Graphing Calculator to the interface. Firmly press in the cable ends. 3. Turn on the calculator and start the DATAMATE program. Press to reset the program. CLEAR 4. Set up the calculator and interface for the Temperature Probe. a. If the calculator displays TEMP (C) in CH 1, proceed directly to Step 5. If it does not, continue with this step to set up your sensor manually.
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This note was uploaded on 02/07/2012 for the course ECON 101 taught by Professor Carr during the Spring '08 term at greenriver.edu.

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Hess's_law_LAB[1] - Hess's Law PURPOSE: To measure the heat...

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