Question

fuels and their efficiency in producing energy

Answer 1

A fuel is any substance that can react, when made to, to provide chemical or nuclear energy that can be used to provide heat or can be used to do work.
The efficiency of fuels in producing energy lies in the following attributes:
i)The process of energy production is controllable in materials used as fuel.
ii)Fuels require averagely less ignition energy. If it were high then the process is counterproductive.
iii)The speed at which fuels burns to provide energy is uniform and not spontaneous or too rapid.
iv)Fuels have high calorific value- the energy produced is high and this what qualifies a material to be used as fuel to provide energy
v)Fuels do not produce toxic materials during the process of combustion.
All the above attributes of fuels make them be efficient energy producers as the pros overly out weigh the cons-if there are any.