Question 1: Define Boyle's Law in your own words.

Answer: Boyle's Law states that for a fixed amount of gas at constant temperature, the pressure of the gas is inversely proportional to its volume.

Question 2: Explain why increasing the pressure on a gas in a sealed container decreases its volume, assuming temperature remains constant.

Answer: Increasing the pressure compresses the gas particles into a smaller space, decreasing its volume due to the inverse relationship described by Boyle's Law, with temperature remaining unchanged.

Question 1: A gas occupies a volume of 0.75 m³ at a pressure of 100 kPa. If the pressure is increased to 150 kPa, what is the new volume of the gas? (Assume temperature remains constant.)

Answer: 0.5 m³

Question 2: A sealed container with a volume of 2.0 litres has an initial pressure of 80 kPa. If the volume is decreased to 1.0 litre, what is the new pressure? (Show your calculation.)

Answer: 160 kPa

Question 1: Describe a simple experimental setup to demonstrate Boyle's Law, including the variables that need to be controlled and how safety can be ensured.

Answer: A typical setup involves a flexible sealed syringe or a J-tube connected to a pressure gauge. The volume of gas can be varied by moving the plunger or adjusting the container size, while keeping the temperature constant using a water bath. To ensure safety, avoid over-pressurising the container, use pressure relief valves, and wear safety goggles.

Question 1: A sample of gas has a volume of 1.2 litres at a pressure of 90 kPa. When compressed, its volume reduces to 0.8 litres. What is the pressure of the gas after compression? (Assume temperature remains constant.)

Answer: 135 kPa

Question 2: Interpret what the change in pressure and volume suggests about the behaviour of gases in confined spaces, based on Boyle's Law.

Answer: The inverse change indicates that as volume decreases, pressure increases proportionally, demonstrating Boyle's Law's inverse relationship for gases at constant temperature.

Question 1: Explain how Boyle's Law is utilised in the operation of a syringe in medical applications.

Answer: When the syringe plunger is pulled back, the volume increases, decreasing pressure inside the syringe, which causes the fluid to be drawn in. Conversely, pushing the plunger decreases volume and increases pressure, forcing fluid out.

Question 2: Discuss the importance of Boyle's Law in designing pressurised containers for industrial use.

Answer: Boyle's Law helps engineers predict how pressure and volume interact under various conditions, ensuring containers can withstand internal pressures without bursting. It guides the choice of materials and safety features to prevent accidents in high-pressure environments.