Heat of Fusion (ΔHfus) of Ice

Materials

Procedures

  1. Put on goggles and apron.
  2. Add crushed ice to the beaker. (up to 150-mL mark)
  3. Place the beaker on the hot plate and turn hot plate on to medium heat.
  4. Take the temperature of the slush every 30 second until it completely melts to water.
  5. Continue to take temperature for another 3 minutes at 30-second intervals, while the water is still boiling on hot plate.
  6. Construct a data table.
  7. Use the data table to make a graph, Temperature (oC) against Time (30 sec.).

Data & Graph

Analysis

1. According to your data, at what temperature did it change from a solid to a liquid? ???
2. According to your data, at what temperature did it change from a liquid to a gas? ???
3. Does this match with what we know about the melting and boiling points of water? Explain ???
4. Describe the graph. ???
5. What is the difference between a physical and a chemical change? ???



How to write a lab report?

Chemistry in January