Heating Curve (Water)

Hypothesis:

Predict: What will the Heating Curve for H2O look like? Why? How does heating water relate to electricity in CA?

 

Materials: 400 mL beaker with 140 g H2O(s) in it; Bunsen burner; ring stand; beaker tongs; thermometer; graph paper.

 

Procedure:

Chart the heating curve of H2O on graph paper. The x-axis will be time (measured in minutes) and the y-axis will be temperature (measured in °C).

Set up the burner, stand, screen and put the H2O(s) in the beaker.

Find the initial temperature before lighting the burner. Your data should start when the temperature (T) is CONSTANT.

Light the burner, place it under the beaker and start timing.

Record your data/observations and plot the points on your graph. Your data should be complete when T is constant (does not change) for at least 5 min.

 

Questions to think about before writing your Conclusion:

• What is HEAT? What is TEMPERATURE?

• What effect does HEAT have on a substance? 

• What is a "phase change" or "physical change"?

• Why does the curve look the way it does and what is each phase called?
*How does this relate to how electricity is made in California? Can you explain our resources and give examples?