(P) Change in Mass (Usually Gas Given Off)

• 1. Measuring the speed of a reaction that produces a gas can be carried out using a mass balance
• 2. As the gas is released, the mass disappearing is measured on the balance
• 3. The quicker the reading on the balance drops, the faster the reaction
• 4. If you take the measurements at regular intervals, you can plot a rate of reaction graph and find the rate quite easily
• 5. This is the most accurate of the 3 methods because the mass balance is very accurate. But it has the disadvantage of releasing the gas straight into the room