英文回答：
Candle Extinguishing Experiment: Investigating the Effects of Oxygen Concentration and Candle Size on Combustion.
Introduction.
Combustion is a chemical reaction that releases energy in the form of heat and light. In a candle flame, the fuel is the wax, and the oxidizer is the oxygen in the air. The rate of combustion depends on the availability of oxygen and the size of the candle.
Hypothesis.
We hypothesized that the rate of combustion would increase as the oxygen concentration increased and the candle size decreased.
Materials.
Two identical candles.
Two glass jars.
Water.
Stopwatch.
Ruler.
Procedure.
1. Fill one glass jar with water and place it upside down over one of the candles. This will create a controlled atmosphere with a lower oxygen concentration.
2. Light both candles and start the stopwatch.
3. Record the time it takes for each candle to burn out.
4. Measure the height of the remaining wax on each candle.
Results.
The candle in the jar with the lower oxygen concentration burned out significantly slower than the candle in the jar with the higher oxygen concentration. The candle in the jar with the lower oxygen concentration also had a taller remaining wax height.蜡烛作文
Discussion.
Our results support our hypothesis. The rate of combustion was lower in the jar with the lower oxygen concentration because there was less oxygen available to react with the wax. The candle in the jar with the lower oxygen concentration also had a taller remaining wax height because it burned for a shorter period of time.
Conclusion.
Our experiment demonstrated that the rate of combustion is influenced by the oxygen concentration and the candle size. This information can be used to optimize the design of candles and other combustion devices.
发布评论