11) which has longer life
than the lead storage cell but
more expensive to manufacture We shall not go into details of
working of the cell and the
electrode reactions during
charging and discharging The overall reaction during
discharge is:
Cd (s) + 2Ni(OH)3 (s) ® CdO (s) + 2Ni(OH)2 (s) + H2O (l )
Production of electricity by thermal plants is not a very efficient method
and is a major source of pollution In such plants, the chemical energy
(heat of combustion) of fossil fuels (coal, gas or oil) is first used for
converting water into high pressure steam