Bunsen Burn Lab
How do Bunsen Burners Work?
Problems:
How should a Bunsen burner be lit and adjusted to attain a blue flame?
What is the hottest part of a Bunsen burner flame?
Is burning the gas a chemical or physical change? Is it endothermic or exothermic?
Hypothesis:
The Bunsen burner should be lit by striking the match first, turning on the gas, igniting the gas, and adjusting the flame using the gas flow valve, the collar, and the table gas release to achieve a blue flame. I predict that the hottest part of the Bunsen burner flame is the tip of the flame. The gas burning is a chemical change. It is exothermic.
Background Information:
Often a chemist needs to heat materials. The Bunsen Burner is one of the most effective ways of doing this. Burners …show more content…
Suspend the match in the barrel of the unlit burner. Turn on the gas and carefully light the burner (Figure 4). Write your results in the Qualitative Data section.
Figure 1: The Ideal LIT burner Figure 2: How to Orient the Burner/Beaker
Figure 3: Heating Water Figure 4: Pin/Match in LIT Burner
Qualitative Data:
Part 1:
Turning the barrel counterclockwise makes the flame more blue and incorporates more oxygen into the flame (Figure 5). Turning the barrel clockwise fully makes the flame more red because it takes away oxygen in the combustion of the gas.
Part 3:
When we turned on the heat, the match did not light (Figure 6). There is a flame surrounding the match, but it is not lit.
Figure 5: Turning the Barrel Figure 6: The Match is Unlit
Burnt Index Card:
The hottest point on the card is the inside portion of the outer ring of the burner.
Quantitative Data:
The smallest division on a thermometer is 1oC. This means that this thermometer can be read to 0.1oC.
Temperature of Water in a Beaker at Various Heights for 2 Minutes
Position
Starting Time
15s
30s
45s
60s
75s …show more content…
We also found that turning the barrel clockwise fully made the flame more red because it took away the oxygen in the reaction.
In our second experiment, we found that Position A, or the base of the flame, was the hottest (of the positions), Position B was the second most hot, Position C was the third most hot, and Position D was the least hot. Position A started from the lowest temperature (296.4 K), and went up to the highest temperature (322.6 K). Position B started from 298.2 K and went up to 317.2 K. Position C started at 297.7 K and heated up to 315.2 K. Position D (Figure 8) started at 298.1 K and went up to 312.3 K. Position A is probably the most hot because there is less energy being lost from the flame to the glassware. In positions B, C and D, some of the heat energy could have easily been lost.
In the third experiment, we found that the match did not light when we turned on the burner. There is a bit of air in between the match and the gas, so the match was never touching the match, thus not lighting it on fire. If we would have left the match in the burner for a long period of time, the heat would have lit the
Problems:
How should a Bunsen burner be lit and adjusted to attain a blue flame?
What is the hottest part of a Bunsen burner flame?
Is burning the gas a chemical or physical change? Is it endothermic or exothermic?
Hypothesis:
The Bunsen burner should be lit by striking the match first, turning on the gas, igniting the gas, and adjusting the flame using the gas flow valve, the collar, and the table gas release to achieve a blue flame. I predict that the hottest part of the Bunsen burner flame is the tip of the flame. The gas burning is a chemical change. It is exothermic.
Background Information:
Often a chemist needs to heat materials. The Bunsen Burner is one of the most effective ways of doing this. Burners …show more content…
Suspend the match in the barrel of the unlit burner. Turn on the gas and carefully light the burner (Figure 4). Write your results in the Qualitative Data section.
Figure 1: The Ideal LIT burner Figure 2: How to Orient the Burner/Beaker
Figure 3: Heating Water Figure 4: Pin/Match in LIT Burner
Qualitative Data:
Part 1:
Turning the barrel counterclockwise makes the flame more blue and incorporates more oxygen into the flame (Figure 5). Turning the barrel clockwise fully makes the flame more red because it takes away oxygen in the combustion of the gas.
Part 3:
When we turned on the heat, the match did not light (Figure 6). There is a flame surrounding the match, but it is not lit.
Figure 5: Turning the Barrel Figure 6: The Match is Unlit
Burnt Index Card:
The hottest point on the card is the inside portion of the outer ring of the burner.
Quantitative Data:
The smallest division on a thermometer is 1oC. This means that this thermometer can be read to 0.1oC.
Temperature of Water in a Beaker at Various Heights for 2 Minutes
Position
Starting Time
15s
30s
45s
60s
75s …show more content…
We also found that turning the barrel clockwise fully made the flame more red because it took away the oxygen in the reaction.
In our second experiment, we found that Position A, or the base of the flame, was the hottest (of the positions), Position B was the second most hot, Position C was the third most hot, and Position D was the least hot. Position A started from the lowest temperature (296.4 K), and went up to the highest temperature (322.6 K). Position B started from 298.2 K and went up to 317.2 K. Position C started at 297.7 K and heated up to 315.2 K. Position D (Figure 8) started at 298.1 K and went up to 312.3 K. Position A is probably the most hot because there is less energy being lost from the flame to the glassware. In positions B, C and D, some of the heat energy could have easily been lost.
In the third experiment, we found that the match did not light when we turned on the burner. There is a bit of air in between the match and the gas, so the match was never touching the match, thus not lighting it on fire. If we would have left the match in the burner for a long period of time, the heat would have lit the