幫我譯做中文 一d好chemistry既字就keep番都得
thanks so much!
For fire to be
produced you need a fuel, a source of oxygen (such as the air) and the
application of heat from an ignition source. These three components of
fire are commonly summarised in the fire triangle. Fire comes from the
conversion of chemical energy in a fuel's chemical bonds into thermal
and light energy. The rate at which this exothermic reaction takes place
causes such a rapid temperature rise in the gaseous products that they
become incandescent and we see a yellow or blue flame. Consider a Bunsen
burner: with the correct proportion of air to gas we see a blue flame
that burns cleanly and releases a large amount of energy due to the
emthalpy of combustion. If there is insufficient air then combustion is
incomplete, resulting in a yellow flame that is rich in carbon monoxide
and contains carbon. It is the carbon that makes the flame yellow (due
to glowing soot particles) and creates sooty deposits.