Question

Give one word for the following.

The temperature at which a substance starts to burn

Answer 1

• The temperature at which a substance starts to burn is called ignition temperature.
• It is the temperature to which a substance must be raised before burning.
• The temperature of the substance must be above the ignition temperature.
• For example, the burning of magnesium ($\mathrm{Mg}$) ribbon in oxygen ($\mathrm{O}$).
• $\underset{\mathrm{Magnesium}}{\mathrm{Mg}\left(\mathrm{s}\right)}+\underset{\mathrm{oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\stackrel{\mathrm{burn}}{\to }\underset{\mathrm{Magnesium}\mathrm{oxide}}{\mathrm{MgO}\left(\mathrm{s}\right)}+\mathrm{heat}+\mathrm{light}$