# Expansion of water.

Essay by damasster November 2003

Title: Expansion of Water

Date: September 22, 2003

Purpose: This experiment is to find out whether water becomes more or less dense as it freezes.

Procedure: 1. Insert the thermometer into one of the holes of the two-holed stopper and then insert the glass tube in the other. Glycerin will help the thermometer and tube to slide into the holes easily.

2. Fill the container to the top with water.

3. Holding the container upright, insert the stopper into the mouth of the container. Make sure that no air is in the container. Water should fill the tube. Attach a small ruler to the thermometer and tube so you can measure the position of the water in the tube.

4. Place the container, thermometer, and glass tube (which will be called the "apparatus") in a container of ice water. When the temperature on the thermometer reaches zero degrees, remove the apparatus.

Move the stopper out so that only about 1 cm of water shows beyond the stopper. Return the apparatus to the ice water.

5. Measure precisely (to the nearest .001 m) the distance the water in the tube is from the stopper. Record this value.

6. Remove the apparatus from the ice and allow the water to warm up to 1 degree Celsius. Hold the container in your hand to add heat, and gently shake the apparatus as you warm it to insure uniform heating. When the temperature has reached 1 degree, measure the distance, which the liquid is from the stopper.

7. Increase the temperature slowly, in 1-degree amounts, and record the temperature and distance the water is from the stopper. Do this until you have raised the temperature as high as you can by holding the container in your hand. This should be about 30 degrees...