Activity 8.9 – Science Form 2 Chapter 8

Activity 8.9:
Aim: To study the factors that affect gas pressure.

Material: Water

Apparatus: Bourdon gauge, 250 ml beaker, Bunsen burner, tripod stand, retort stand with clamp, wire gauze, wooden block, thermometer, rubber tube, stirrer, round-bottom flask and syringe

(A) Volume
Instruction
1. Set up the apparatus as shown in Figure 8.35.

2. Push the piston into the syringe. Observe the change in the reading of the Bourdon gauge.

3. Pull the piston out of the syringe. Observe the change in the reading of the Bourdon gauge.

4. Record your observations.


Question
What is the relationship between the volume of air and air pressure in the syringe?


(B) Temperature
Instruction
1. Set up the apparatus as shown in Figure 8.36.

2. Heat up the water in the beaker slowly. Observe the change in the reading of the thermometer and the Bourdon gauge.

3. Record your observations.


Question
What is the relationship between change in temperature and air pressure?

Answer:
(A)
When volume of air in the syringe decreases, air pressure increases.

(B)
When temperature increases, air pressure increases.