Question

Why is charcoal considered a better fuel than wood? Why is charcoal less in use now? State one reason in each case.

Answer 1

Charcoal a better fuel

1. Calorific Value: The calorific value is the heat generated by a fixed amount of fuel when it is burnt under normal conditions. The SI unit for it is $\frac{\mathrm{kJ}}{\mathrm{kg}}$.
2. Explanation: The calorific value of coal is more than the calorific value of wood. Thus, it is clear that the same amount of charcoal will give out more heat than the same amount of wood.
   

Charcoal less in use now

1. The reason behind charcoal being less popular today is the number of health issues that arise from its use.
2. The other reason behind the same is the environmental pollution associated with using charcoal, as it produces more smoke.