Agasoline engine transform approximately 34 percent of the fuel's chemical energy into mechanical energy. if energy is conserved what happenes to the other 66 percent?

This is what i found on google “what happens to the bond angle when you add or remove an electron domain? the bond angle decreases as you add domains 5. can you force the atoms into new configurations by pushing atoms around? note: we can think of a bond or a lone pair of electrons as a “domain” of electrons.” i hope this you