Question
Explain why a flame from a bunsen burner will not pass through a piece of metal (wire) gauze for quite some time.
Solution
When the wire gauze is held over a flame, the gauze conducts a lot of heat from the flame.
So, the gas reaching above the gauze fails to acquire its ignition temperature and therefore it does not burn above the wire gauze.
After a sufficient time has passed, the temperature above the gauze will become equal to ignition temperature. Thus, at this temperature, the gas will burn and the flame will appear.
So, the gas reaching above the gauze fails to acquire its ignition temperature and therefore it does not burn above the wire gauze.
After a sufficient time has passed, the temperature above the gauze will become equal to ignition temperature. Thus, at this temperature, the gas will burn and the flame will appear.
