FA_Lab Report 7_Conductivity

FA_Lab Report 7_Conductivity - Chem. 124 Name: Partner :...

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Chem. 124 Dr. Anariba Name: Adam Pescatore Computer #: 02 Partner : Ariana Breen Conductivity: LED Experiment Instructions: Each person is to submit an individual report after performing the experiment. This report is due at the beginning of class on 19 May . You must turn in a typed hard copy of this report. Part 1: Temperature Dependence of Resistance (R) of a Metal In the table below, record the results of your measurements of resistance for each temperature you recorded. Be sure to title your table appropriately. Resistance and Temperature Temperature Resistance ( ) Room Temperature 152.89 Cold Temperature Decreased, 45 minimum, jumped back up 1. Describe what you observed, i.e., how does resistance change with temperature? Explain why the resistance of a metal changes as it does with temperature. When the temperature decreased, the resistance also decreased. The electrons do not have as much energy at this temperature. When the temperature is lower there will be fewer collisions and more less released. When the temperature decreases; the resistance decreases. The bonding is tighter when the temperature is lower; there is a better orbital overlap and a larger band gap. 1
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Part 2: Band Gap of a Compound Semiconductor LED: Effect of Composition In the table below, record the results of your observed values of voltage and color and your calculated values for the energy and wavelength. Be sure to title your table appropriately. LED Measurements
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FA_Lab Report 7_Conductivity - Chem. 124 Name: Partner :...

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