Table of Contents
Why does fire grow with oxygen but go out when you blow on it?
That’s a great question. As you figured out, blowing on the embers increases the rate they burn, by getting more oxygen to the site where oxygen reacts with the carbon compounds. The candle already has a lot of oxygen available. What’s limiting it is the flow of evaporated wax up into the flame.
Why does blowing on a fire make it bigger chemistry?
When you blow on a fire, you create a lower pressure system full of oxygen to give the fire the appropriate amount of oxygen to burn well. They are actually shooting oxygen into the fire to maximize the burning power. And that makes it burn longer.
Why does a candle flame goes out when you blow on it?
Answer: When we blow air on a burning candle, we remove the hot air around the flame. In this way, we reduce its temperature below the flash point. Thus, the candle goes out.
Why does oxygen make flames bigger?
The more oxygen molecules that collide per second with the fuel, the faster the combustion reaction is. You can increase the surface area of a solid by breaking it up into smaller pieces. If you chop or break up wood into small pieces, it will ignite and burn more quickly than larger pieces of wood.
Why shouldnt you blow on fire?
The obvious answer is that oxygen is one of the three things a fire needs to survive. But when you blow, that’s not exactly what you’re doing. You’re actually creating a miniature pressure system that’s feeding oxygen more consistently into the embers which, in time, creates its own system for a sustainable fire.
Does air make fire bigger?
Wind has a strong effect on fire behavior due to the fanning effect on the fire. Wind increases the supply of oxygen, which results in the fire burning more rapidly. It also removes the surface fuel moisture, which increases the drying of the fuel. Air pressure will push flames, sparks and firebrands into new fuel.
Why do we fan a flame?
That only works for fires so small that you can literally blow the flame away from the fuel long enough to allow it to cool below the ignition point. If the flame is too large or hot, fanning the flame will only accelerate the burning process as it provides extra oxygen for the reaction.
Is it bad to blow out a candle?
Why blowing out candles is risky right now “Blowing out candles can expel virus particles, just like breathing, talking, singing, shouting, coughing and sneezing, if the person is infected,” he said. According to Dr. David M.
Does oxygen make flames bigger?
Oxygen is not flammable, but it does intensify the combustion process and can cause fire to burn hotter and faster. It does not act as fuel for the fire to burn, it does however act as the oxidizing part of the fire triangle.
Why does blowing on a fire make it burn better?
Oxygen is an essential part of the fire process. Without oxygen, burning stops and the fire goes out. This is why a candle goes out if you cover it up with a lid and remove the oxygen. For this article, oxygen is what we’re adding to the fire by blowing.
Why does blowing on an ember kill a flame?
If I blow on embers, they start to glow, but on a candle flame, it kills it. Why? That’s a great question. As you figured out, blowing on the embers increases the rate they burn, by getting more oxygen to the site where oxygen reacts with the carbon compounds.
Why do we fan the fire above the charcoal?
By fanning the candle, you create a breeze that carries away the heat from the flame, meaning that there is not enough energy left to sustain the reaction. The flame goes out. In order to burn, a fire needs three things: Heat, Fuel, and Oxygen.
Why does blowing on a Candle put out a flame?
That flow is driven by the heat given off by the flame itself. When you blow, you cool down the gases and the surface of the candle and spread out the wax vapor. So when you blow on it, there’s no longer a region which has enough wax molecules in it and also is hot enough to get the reaction to occur.