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Unformatted text preview: Stephanie Pham Latent Heat of Fusion of Ice Lab IB Chemistry SL R. W. Johnson High School November 10, 2010 Candidate ID Number: 003342-005 Instructor Design: Research Question: What is the value, in Jg-1 , of the latent heat of fusion of ice? Purpose: Latent Heat of Fusion of Ice is defined as the amount of energy needed to melt 1 gram of ice into water at 0˚C and your task is to calculate a value for this in Jg-1. Variables: • Independent- volume of ice cubes • Dependent- temperature of water mixture • Controls- o Same equipment used throughout the lab o Size/shape of ice cubes should be uniform in order to get consistent data Materials and Equipment: • an insulated cup, • suitable thermometer Chemicals: • 100 mL of H 2 O • freely melting ice cubes Safety: 1 • Although water is generally not a dangerous chemical, goggles were worn as a precaution for the duration of the lab. Procedures: In all aspects of this simple lab be aware of uncertainties. a) Into the insulated cup measure 100 mL of water using a 100 mL graduated cylinder and record its temperature. b) Take a freely melting ice cube, which, if freely melting, will be at 0˚C and quickly dry it with a paper towel. Drop it into the water in the insulated cup. c) Using the thermometer, stir the contents and record the temp of the water when all the ice has melted. d) Find the final volume of liquid in the cup using the same graduated cylinder so that you can determine the “volume” of ice added and thus the mass added since 1 gram of water has a volume of 1 mL at about room temperature. e) Repeat at least twice to verify your results. f) Use the data you collected to calculate the latent heat of fusion of ice. By the way, the correct answer is 335 J/g. Data Collection and Processing: Ice Lab Data Table Initial Volume mL ( ± 0.5) Volume Calculations mL ( ± 0.5 + ± 0.5) Final Volume mL ( ± 1.0) Initial Temp ˚C ( ± 0.5) Final Temp with Ice ˚C ( ± 0.5) Change in Temp ˚C ( ± 1.0) 1 st...
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This note was uploaded on 10/05/2011 for the course CHEM 1211 taught by Professor Staff during the Spring '09 term at Gainesville State.
- Spring '09