General Information • Bunsen burners are used to provide a safe heat source during many laboratory experiments. • Before using a Bunsen Burner in any experiment, it is important to review the proper techniques for lighting, adjusting, and safely using a Bunsen Burner.
General Information • The Bunsen Burner consists of a base, a gas inlet, the gas jet, the air control vent with a collar for adjusting the air flow, the barrel, and the mouth of the tube.
Safety Rules: • Only use the Bunsen Burner when specifically instructed to use it during an experiment authorized by the teacher. • Never turn on the gas unless instructed by the teacher. • Always inspect the Bunsen Burner, tubing, and gas valve before using the burner.
Safety Rules: • Always follow proper procedures for lighting and using a Bunsen Burner. • Tie back long hair and do not wear loose, long sleeves. Never reach over an exposed flame. • Use tongs when holding objects in a flame.
Safety Rules: • Never leave a lit Bunsen Burner unattended. • Always turn off a Bunsen Burner when not in use. • Always wear safety goggles when using a Bunsen Burner.
When a premixed flame burns in open air with an excess of fuel, there appears in addition to the flame zone a zone of diffusion flame; This is accounted for by the diffusion of atmospheric oxygen, as, for example, in the Bunsen flame produced by a burner to which the air intake can be regulated, ...
Barrel Air Intake Gas Intake Base used to direct flow of gas into flame; becomes very hot when used for a long period of time controls amount of oxygen (O2) that combusts; used to adjust color of flame controls amount of gas that flows into burner; used to adjust height of flame provides support for burner; remains cool during heating Parts of a Bunsen Burner
Region C: 1000-15000 Region B: 15000 max Region A: Less then 500o
Aluminum Iron Copper Brass Tin Lead Zinc Steel Stainless Steel Gold Silver 660 1535 1083 899 260 371 427 1342 1425 1065 962 Melting Points of Various Wires (0C)
Analysis Questions • Compare the temperature regions of the Open Flame. Write an inequality statement. • Looking at the melting points of the various wires, why did Aluminum not melt in region A? • You are given an unknown wire and it only melts when the vents are open, region B. Using your melting point information, what kind of wire could it be and why? • Using information from this lab, why are buildings made out of steel and not another type of metal?
Conclusion • What were your objectives and were they met? • What did you learn? • Which gives a hotter flame- vents open or closed? Explain your reasoning. • Which Flame should be used when performing experiments and why? • Any Errors that effected your results?