Extension Question(s) An alternative method of determining the calibration factor of a calorimeter is to perform an electrical calibration with the setup shown below using 100 mL of water. Calorimeter set-up power supply voltmeter ammeter A (V thermometer magnetic heating coil water stirrerbar A student performed the electrical calibration to calibrate a calorimeter and obtained the following results: Time (seconds) Temperature ("C) 0.0 20.0 Voltage used = 5.80V 30.0 20.0 Current used = 1.60 A 60.0 20.0 Power turned on at this point 90.0 21.0 120.0 21.8 150.0 22.5 180.0 23.5 210.0 24.5 240.0 25.0 Power turned off at this point 270.0 24.5 300.0 24.0 330.0 23.5 360.0 23.2 390.0 23.0 1. Use the data above to plot a graph of Temperature against Time. Label the graph with an appropriate title and labelling of axes. Annotate on the graph to show the temperature change during this calibration and indicate the times when the power was turned on and off on this graph. Describe the quality of this calorimeter. 2. Use the information from Question 1 above to calculate the calibration factor of this calorimeter to an appropriate number of significant figures. Show your working. 3. Both the electrical calibration described above and the chemical calibration using potassium nitrate in the experiment you performed, used 100 ml of water. Explain why this volume of water would be required when determining the AH of the reactions of HCI and CH3COOH with NaOH that was done in this experiment