So let's say a cactus will catch on fire at 500 degrees Celsius. If you use a 500 degree flame it will light on fire. But if you took it into a 500 degree room will it also light on fire?
If you think a little, the answer is in your question. What do you think that statement above (bold) even mean? It has nothing in it about flame or any other way to reach these 500 degrees. If the cactus reaches 500 C the violent reaction with oxygen (which we call burning) will start, right?AMan24 said:So let's say a cactus will catch on fire at 500 degrees Celsius. If you use a 500 degree flame it will light on fire. But if you took it into a 500 degree room will it also light on fire?
A flame is a visible, gaseous part of a fire that emits light and heat. It is caused by the combustion of a material, which produces hot gases that are able to react with oxygen in the air.
Heat is a form of energy that is required to initiate and sustain the burning process. When a material is heated, it releases flammable gases that can react with oxygen in the air to produce a flame. The heat also raises the temperature of the surrounding air, causing it to expand and rise, creating a convection current that fuels the fire.
No, a flame cannot exist without heat. As mentioned before, heat is necessary to initiate and sustain the burning process. Without heat, there would be no energy to break the chemical bonds of the material and release flammable gases.
Yes, it is possible for something to burn without a flame. This is known as smoldering or glowing combustion, where a material burns slowly and without a visible flame. This can occur when there is not enough oxygen present to sustain a flame, or when the material is too dense to allow air to flow and create a flame.
The color of a flame is determined by the chemical properties of the material being burned. Different elements and compounds produce different colored flames when they are heated. For example, copper produces a blue-green flame, while sodium produces a yellow-orange flame. The color is also affected by the temperature of the flame, with hotter flames producing a brighter, whiter color.