Comparison between electrical energy and ideal fuel! !!
Answers
Using the calorific energy content of various chemical substances and materials to generate electricity involves three energy conversion processes each of which introduces inefficiencies.
Energy Conversion Process Diagram
Chemical elements however contain intrinsic electrochemical energy potential associated with the energy of the electrons in the outermost electron shell or valence band (explained in the Energy section on the Cell Chemistries page) and this energy is converted directly to useable electric energy in batteries. The table of Electrode Potentials on the same page gives an indication of the relative magnitudes of these energies at the molecular level. The following table shows the magnitude of energy available from these sources when used in practical devices