What is the use of barrel in the bunsen burner?
The barrel is the long bit coming out from the base of the burner that the gas travels up. Down the bottom of the barrel, there is this little knob that you spin around. This controls the amount of air that goes up the barrel. If you cover up the holes, this makes the flame yellow, which means the gas isn’t to its full power and heat level, because the gas needs oxygen to stay alight. When you un-cover the holes, the flame goes blue. This is harder to see. WHen the holes are un-covered, the gas flame is to its full power and heat level because it has the maximum amount of oxygen coming to it.
