2.3.1 Practical: How to measure + Heating using a Bunsen burner. 

PART B: Swap Person 1/Person 2 from the previous experiment.

Equipment:

• Bunsen burner

• gauze mat

• tripod

• 250mL beaker

• 200mL measuring cylinder

• watch glass

• thermometer

• ice cube

1. Collect the equipment as your teacher tells you and place it safely on the bench. Make sure the hole on the Bunsen burner is CLOSED.

2. Person 1 put the gauze mat on the top of the tripod near the gas tap.

3. Person 1 attach the free end of the Bunsen hose to the gas tap. The Bunsen should not be under the tripod. 

4. Person 2 turn on the tap and have a slow stream of water. 

5. person 2 fill the measuring cylinder to the 150mL mark. It does not have to be exact for this experiment. 

6. Person 2 pour the water into the beaker.

7. Person 2 carefully put the beaker on the tripod in the centre of the gauze mat.

8. Person 1 put the ice cube in the watch glass.

9. Person 1 put the watch glass on the top of the beaker. 

10.  Person 2 turn the Bunsen tap to fully on (this is half way around).

11. Person 1 light the Bunsen by bringing the flame up the side from just below the tip. Not from the top or over the top. The flame should be yellow. 

12. Person 2 slowly turn the gas tap down until the flame is a size that will just touch the bottom of the gauze when the Bunsen is put under it. 

13. Person 1 use the hose to push the Bunsen under the tripod to sit in the middle. 

14. Person 2 start the stopwatch. 

15. Both people carefully watch to make sure the flame does not go out and time the amount of time it takes for the ice cube to melt completely.