Core Practical 14: Pressure and Volume of a Gas Relationship

Question 1

CP14 Aim

Answer 1

Prove Boyle’s Law

Question 2

CP14 Equipment list

Answer 2

Tube with scale with trapped mass of gas.
Pressure gauge
Oil

Question 3

CP14 Method

Answer 3

1. Increase pressure of gas trapped in sealed tube of oil; increases pressure on oil; oil level rises and air compresses
2. Measure pressure on gauge and volume of gas from the column
3. Wait for temp to return to room temp
4. Find at least 7 data values for pressure and volume
5. 3 repeated reading and find mean volume for each pressure value

Question 4

CP14 Analysis

Answer 4

Plot pressure against 1/v to find relationship; should be straight line with gradient nRT
as PV=nRT
P = nRt * 1/V

Question 5

CP14 Safety

Answer 5

Clamp apparatus
- Apparatus could fall over; clamp to desk
Press vertically downwards
- Pressure pump unstable at high pressure, press vertically downwards