Ignition Temperature Lab Report

This reaction is highly exothermic and a lot of heat liberated during the reaction. This heat is sufficient to burn a spirit lamp. While doing this experiment it is necessary to use small quantities of the reagents because this reaction can be explosive.
2KMnO4 + 2 H2SO4 → 2 KHSO4 + Mn2O7 + H2O
These activities show that different substances catch fire at a different temperature. The lowest temperature at which a substance catch fire is called its ignition temperature.
Combustible substances do not catch fire or burn as long as its temperature is lower than its ignition temperature.
Now let me do an activity which tells you why reaching ignition temperature is necessary to burn an object. You know that paper catch fire with a flame. Let me
So in the presence of water, the ignition temperature of the paper is not reached. Hence it does not burn.
I think you will now recall your experiences where you might have struggled to burn some materials like wet cloth, wet paper, wet wood etc. Because ignition temperature of these materials was not reached due to the presence of water in them. Sometimes you have even quickly burned a wood by pouring little kerosene oil, petrol, or alcohol over it. This is because these materials having low ignition temperature. Substances having low ignition temperature are called inflammable
burns with a flame and charcoal burns with a glow. Now let us look at some facts about the flame. A flame is the visible gaseous region of a fire. A substance which vaporises during burning, give flame. Observe the colour of a candle flame and flame of a Bunsen burner. We can see candle burns with a yellow flame and gas Bunsen burner burns with a blue flame.
Let us do an activity to see the formation of a flame
Place a glass tube near the wick of the burning candle and observe the other end of the glass tube. You can see now the vapours of the wax coming out of the glass tube. Bring a burning matchstick near the vapours. You can see the wax vapours coming out of the glass tube and the tip of the glass tube start burning with a flame. This is because molten wax in the candle vaporises through the wick and these vapours during burning form a flame.

Now let us conduct an activity to see the zones of the candle.
Light a candle with the help of a match stick. Surrounding the wick you can see dark zone this is called Inner zone where you can see unburnt wax vapours. In the previous activity, you have observed the wax vapours passing through the glass tube. This zone is least