Question

In which cell the free energy of a chemical reaction is directly converted into electricity?

Answer 1

In the dry cells which are commonly known as the batteries,the chemical energy is directly converted into electrical energy for our usage.

Inside of a dry cell or battery, various chemical reactions take place which create a flow of electrons for the production of electricity.

These dry cells are vastly used in the modern electricial equipments.

Answer 2

Fuel cell the free energy of a chemical reaction is directly converted into electricity.

Explanation:

• A ‘fuel cell’ is a battery like device that converts the chemical energy of a fuel into electrical energy through the “chemical reaction with oxygen”.

• Fuel cell which can produce electricity through a chemical reaction with combustion of any organic matter.

• It converts ‘hydrogen and oxygen’ into water.

• Operates much like battery, except they don’t require electrical recharging.

The chemical reaction in fuel cell is as follows:

$2 H_{2}+O_{2} \rightarrow 2 H_{2} O$.