Everything Science Grade 10

CHAPTER 3. STATES OF MATTER AND THE KINETIC MOLECULAR THEORY 3.1

Gas

Condensation

Liquid

Freezing

Solid

Boiling (or evaporation) Melting

Sublimation

Figure 3.1: Changes in phase

Formal experiment: Heating and cooling curve of water

Aim: To investigate the heating and cooling curve of water.

Apparatus:

• beakers


• ice


• Bunsen burner


• thermometer


• water

Thermometer

BeakerIce

Thermometer

BeakerWater

Method:

1. Place some ice in a beaker.

2. Measure the temperature of the ice and record it.

3. After 1 minute measure the temperature again and record it. Re-

peat every minute, until at least 3 minutes after the ice has melted.

4. Plot a graph of time versus temperature for the heating of ice.

5. Heat some water in a beaker until it boils. Measure and record the

temperature of the water.

6. Remove the water from the heat and measure the temperature ev-

ery 1 minute, until the beaker is cool to touch.

Warning:

Be careful when handling the beaker of hot water. Do not touch the

beaker with your hands, you will burn yourself.

Results:

1. Record your results in the following table:

Chemistry: Matter and Materials 57