A first-order reaction is 50% completed in 40 minutes at 300 K and in 20 minutes at 320 K. Calculate the activation energy of the reaction.
(Given: log 2 = 0.3010, log 4 = 0.6021, R = 8.314 JK–1 mol–1)
What happens when
A freshly prepared precipitate of Fe(OH)3 is shaken with a small amount of FeCl3 solution?
Define fuel cell and write its two advantages.
These are voltaic cells in which the reactants are continuously supplied to the electrodes. There are designed to convert the energy from the combustion of a fuel like a hydrogen, methane, methanol, etc directly into electrical energy.
Advantage : -
(1) A fuel cell works with an efficiency of 60 to 70 %
(2) They are pollution free