Question

Flame of a burning candle goes off when we blow over it strongly. give two reasons

Answer 1

first - when we blow on it hardly is temperature get down .
second - when we blow on it the blanket of CO2 get around it which disconnect the supply of O2 .

Answer 2

The candle flame is highly instable. The wick is the primary thing to burn - it would burn away in seconds if it failed to start the next process. The fire melts the wax, and that again is pumped into the wick and turned there into combustible gas.

The candle’s flame is a gas flame. Blow into the flame and you blow away the gas that is burning. With the flame’s disappearance there is immediately not enough heat left to turn more wax into gas and that’s the end of the little fire.

The dangerous thing in a room fire is not the wooden table and chairs on fire - these things do not burn that easily. It is not even the fat sofa catching fire - even these things need a lot of energy to enter the process.

The dangerous thing is the gas that is accumulating for two or three minutes of a slow smoldering fire underneath the ceiling . This film gives you an impression of the strange dynamics of fire. You have plenty of time to act in the beginning, even time to calm down and consider the best course of action (unplug that lamp’s electricity before you pour a bucket of water onto the fire…)