(a) Explain the structure of candle flame. Also, draw its diagram.
(b) What is calorific value?
(c) What are the characteristics of a good fuel?
Structure of a Candle flame
It has three main zones, they are-
(b) Calorific value is the amount of heat energy present in food or fuel that is determined by the complete combustion of a specified quantity at constant pressure and in normal conditions. It is also called calorific power. The unit of calorific value is kilojoule per kilogram i.e. KJ/Kg.
(c) Characteristics of good fuel:
Easy transport and store
Burns at a moderate rate
Produce a large amount of heat
Do not leave behind any undesirable substances.
Does not cause pollution.