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Candle Burn Rate Lab

632 Words3 Pages

My hypothesis of the candles having a constant burn rate within time intervals was partially supported during the candle lab because the candle did have a constant burn rate in mass (g/min), but the candle did not have a constant burn rate in height (mm/min). The mass of the candle decreased steadily by 0.057g/min in average. On the other hand, the height decreased at an average burn rate of 2 mm/min, but there was one burn (from burn 1 to burn 2) when the height of the candle (including the wick) increased by 1.88 cm. At that burn rate, the candle would have decreased to 2.5 cm at around 28 minutes, it would have completed the candle at around 40.5 minutes. At the beginning, the wax of the candle felt firm, and it was 8.1 cm and 9.078 g. …show more content…

The candle was 7.15 cm tall and 8.647 g; the burn rate was 3.65 mm/min and 0.062g/min, which means that the bent wick contributed to the larger height decrease, and the mass still steadily decreased. In burn 4, the same processes happened as burn 1, but more black spots formed due to combustion, the wax was pulling up at the base of the wick, and the wick curled more. The candle was 6.85 cm tall and 8.532 g; the burn rate was 1.5 mm/min and 0.058g/min, which means that the mass and the height decreased at a steady rate. In burn 5, the same processes happened as burn 1, but the wax solidified on the sides of the candle. Furthermore, the flame waivered due to air movements around the candle. The candle was 6.3 cm tall and 8.401 g; the burn rate was 2.75 mm/min and 0.066g/min, which shows that the height and the mass decreased slightly more than the other samples. Last but not least, in the burn with the beaker, the flame disappeared in 11.2 seconds due to the lack of oxygen for combustion. In addition, there was excess water that formed inside the beaker. We believe that the beaker caught some water vapor from as a product of combustion, and it condensed near the surface of the

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