Please explain this
" If we want to obtain maximum work from a galvanic cell, then the charge has to be passed reversibly.The reversible work done by a galvanic cell is equal to the decrease in its gibbs energy .":

Question

Please explain this 
" If we want to obtain maximum work  from a    galvanic cell, then the charge has to be passed reversibly.The reversible work done by a galvanic cell  is equal to the decrease in its gibbs energy .":

anonymous · Answer

Maximum work is done when a process is reversible. Because there is no loss of heat to surroundings due to change in entropy.