Candle Burning Lab

If the difference between the recorded times are more than 10%, add a third trial. Repeat these steps with each size beaker. Calculate the average time for each beaker and record the data. The next step of the lab exercise is determining the exact volume of the beakers used in the burn time experiment. Fill a beaker to the top with water. Carefully pour the water from the beaker into a graduated cylinder. Reading the meniscus, record the exact volume into a data sheet. Repeat this step with each size beaker until all volumes are recorded into the data sheet. The final process of the Graphing and Estimating lab is plotting the recorded data onto a graph. Using the data recorded for burn time, in seconds, place the data on the vertical axis. Use the horizontal axis for the volume in milliliters. With the data points plotted determine whether a straight line or a simple curve will best represent the data. Now, obtain a jar and determine the volume. Fill the jar to the top with water. Carefully pour the water into a graduated cylinder. Precisely record the data. Using the plotted data on the graph and the simple curve or straight line to predict how long it would take for the flame to burn out on the candle if it was covered with the jar that was just measured.

2. A large diagram of the top 2 cm of the candle was drawn. The diagram was labeled with a brief description of the wax 3. The candle was lit. The wax was observed at the wick.

The experiment can also be done to compare the burn rate of different colored candles.

Allow the candle to burn for a few minutes noting any changes. 4. Blow out the candle and immediately place a lit match in the smoke just above the wick. Observe and record what happens. 5.

1. Place a small amount of wax from a birthday candle into a test tube. Heat gently over a burner flame until the wax melts completely; then allow

Then take a wooden splint out of the beaker that it was in and insert the tip into the hottest part of the flame. Then the person that was using the spectroscope would then align the light slit in the spectroscope to the color of the flame. They would then read off what they saw on the emission line spectrum and the estimated wavelength numbers. We would then repeat the process of using the spectroscope again for another trail of the same substance. After this we would repeat the same process of the two trials for all known and unknown substances.

the lit candle, then the candle will stay lit for longer if it’s covered by the largest beaker (400 ml) ,because fire needs oxygen to stay alive.

The fun filled journey you take when you burn a Prize Candle speaks to your sense of sight, smell & touch.

element of a candle can affect how fast it burns, I wanted to see how this experiment turns out http://candles.lovetoknow.com/Do_White_Candles_Burn_Faster_than_Colored_Candles

The hypothesis that temperature will affect the length of time a glow stick will last was tested by measuring how long it takes for glow sticks to burn out at different temperatures. Temperature was the independent variable and the time for the glow sticks to burn out was the dependent variable. Five trials (glow sticks) were measured for each experimental temperature. The constant for all of the groups was the type of glow stick. The glow sticks used for this experiment were 10 cm yellow sticks made by

“Embarrassing as it is, I put water on it and it [the flames grew larger] you know and apparently you don’t do that. After reading the bottom [of the candle] it does tell you that... The thing was burning hot so I grabbed the oven mitts and walked outside and hit it with the water hose.”

Since the watch glass was titled slightly toward the air vent of the Bunsen burner, the wire would heat the solution causing vapor to change the color of the flame. The color of the three unknown solution was observed and compared to the seven known solutions for identification. Throughout the experiment, there were very little

This lab has taught me new things and helped me understand previous concepts I learned in more detail. From this lab, watching reactions between complete and uncomplete combustion helped me differentiate between both reactions. Prior to this lab, I had a bit of confusion between the two, however now I can picture the reactions in my head which is that complete combustion will make a noise and leave no residue while uncomplete combustion leaves lots of residue. These visual aids will help me remember and differentiate the two types of combustions and never cause confusion again. During the lab, only the test tubes full of ½ gas, 1/5 gas and 1/10 gas worked. This is due to the reason that me and my group struggled to close the test tubes quickly

In this project we examined three explanations that talk about (a) candle(s) in a jar and their investigation reasoning to why the labs they did were concluding in such a way. The first explanation resulted that the candle inside the jar took up all the oxygen molecules inside the flask which then lowers the pressure inside and the higher pressure outside the flask is what causes the water to rise up. The second explanation resulted in that the air pressure increases inside the jar because of the heat from the candle, which causes air to come out of the jar and once the candle cools down the pressure decreases and the pressure outside the jar increases which results in pushing the air in and making the water rise up. The third explanation resulted in oxygen inside the flask becoming carbon dioxide which then dissolves in water causing the air pressure to decrease under the glass and the higher pressure outside the flask pushed the water up the flask. I believe that explanation number three is right because the flame causes carbon dioxide to be created and that

As the change in mass and temperature is small for both candle wax (and paraffin in this experiment), it is clear that there is little changes when these fuels are combusting in their physical states. This means that these fuels last longer but are an unreliable source of energy as a fuel. The change in temperature being small suggests that these alkanes produce poor heat output, however that fully contradicts their high experimental and theoretical heats of combustion and percentage yields. The fact that the change in temperature was so low can be experimental side effects. One being that candle wax particularly produces the extra energy source of light possibly more so than paraffin and even the experiment 1 alcohols. Another experimental error as to why the change in temperature isn’t very large could be due to the surrounds not being a fully insulator set up (calorimetry – experiment 1