Hi! I have recently completed a bunsen burner lab and need help with a few conclusion questions:

1) What kind(s) of energy is released by the reaction of fuel and air in this system?

2) Which part of the Bunsen flame is hottest? How do you know?
->I researched it and know the top of the inner cone (non-luminous) part is the hottest, but my lab group did not complete the experiment, so I don't know exactly why this is so

Thanks in advance!

Isn't heat the energy that is released?

Also light energy is released.

Yes, the top of the inner cone is the hottest. That is the point at which the maximum reaction is taking place.
CH4 + 2O2 ==> CO2 + 2H2O

Hello! I'm happy to help you with your conclusion questions from your bunsen burner lab.

1) What kind(s) of energy is released by the reaction of fuel and air in this system?
In a bunsen burner lab, the reaction that occurs between the fuel (typically natural gas or methane) and air releases thermal energy. This thermal energy is released as heat, which can be observed as the flame produced by the burner.

2) Which part of the Bunsen flame is hottest? How do you know?
Based on your research, you already know that the top of the inner cone (non-luminous) part of the flame is the hottest. To understand why this is so, there are a couple of factors to consider.

One significant factor is the availability of oxygen. The inner cone of the flame receives the most air/oxygen supply due to the mixing of the fuel gas with air in the bunsen burner. The oxygen supports complete combustion, where the fuel reacts fully with the oxygen, producing a high-temperature flame.

Another factor is the fuel-to-air ratio. In the inner cone, the fuel-to-air ratio is typically closer to the stoichiometric ratio, which is the ideal ratio required for complete combustion. This means that the proportion of fuel to air is balanced, resulting in efficient combustion and a hotter flame.

To confirm the hottest part of the flame, you could have conducted an experiment by measuring the temperature at various parts of the flame using a thermometer or temperature probe. However, since your lab group did not complete the experiment, you can rely on the research you mentioned. The understanding that the inner cone of the flame is the hottest part is widely accepted in the scientific community.

I hope this helps! Let me know if there's anything else I can assist you with.