Chapter Name: Combustion, Fuels and Flames
Activity Name: Understanding ignition temperature in Combustion, Fuels and Flames
The experiment aims to understand the concept of ignition temperature by comparing the combustion of two paper cups, one with water and one without water, when heated using a candle.
- Two small paper cups, water, tripod stands, candle.
Step by Step Procedure:
- Take two small paper cups.
- Pour water into one of the cups.
- Place the two cups on separate tripod stands.
- Heat both cups simultaneously using a candle flame, following the setup shown in the figure.
- Note which cup burns first.
- Observe whether the water in the cup becomes hot or not, and record the findings.
- Handle the candle flame with care to avoid accidents.
- Ensure a safe distance from flammable materials during the experiment.
- Perform the experiment under adult supervision, especially when involving children.
Lesson Learnt from Experiment:
The experiment demonstrates the concept of ignition temperature, which is the minimum temperature at which a substance starts to combust. The cup without water likely reaches its ignition temperature faster and burns first compared to the cup with water, which remains cooler due to the heat-absorbing properties of water.