Phase Change Lab

STANDARD 3240-01 Students will observe and describe chemical and physical change.

Objectives
3240-0101 Differentiate between common physical and chemical changes.
3240-0102 Analyze factors that influence chemical and physical change.

Intended Learning Outcomes
1a. Make observations and measurements.
1g. Construct models and simulations to describe and explain natural phenomena.
4d. Recognize the personal relevance of science in daily life.

Materials

Procedure

1. Mix a little water with the ice and record the temperature at time zero.
2. Turn on the heat
3. Gradually heat the mixture while stirring.
4. Record the temperature at 1 minute intervals.
5. Continue to heat the water and record the temperature until the water has been boiling for about 5 minutes. Note: Do not let the beaker go dry, turn the heat off before the water has all boiled off.
6. Graph your data.

Analysis

What happened to the temperature of the water as the ice melted? As the water boiled?

Why do you think that the temperature did not change?

Where do you think that the energy from the burner was going?

A student data page including the analysis questions is available in .pdf format.

Phase Change Lab STANDARD 3240-01 Students will observe and describe chemical and physical change. Objectives 3240-0101 Differentiate between common physical and chemical changes. 3240-0102 Analyze factors that influence chemical and physical change. Intended Learning Outcomes 1a. Make observations and measurements. 1g. Construct models and simulations to describe and explain natural phenomena. 4d. Recognize the personal relevance of science in daily life. Materials Thermometer Thermometer clamp Ring Stand Hot Plate Large Beaker Ice Procedure 1. Mix a little water with the ice and record the temperature at time zero. 2. Turn on the heat 3. Gradually heat the mixture while stirring. 4. Record the temperature at 1 minute intervals. 5. Continue to heat the water and record the temperature until the water has been boiling for about 5 minutes. Note: Do not let the beaker go dry, turn the heat off before the water has all boiled off. 6. Graph your data. Analysis What happened to the temperature of the water as the ice melted? As the water boiled? Why do you think that the temperature did not change? Where do you think that the energy from the burner was going? A student data page including the analysis questions is available in .pdf format.