Thanks a million to Darwin, Drakkith and Mishrashubham as i really appreciate your well written detailed answers as i was growing frustrated with empty searches to this perplexing biochemical reaction until i stumbled across this site and intuitively figured that someone(s) on here would know...
Hopefully someone can assist me here as I've searched the internet (google searches, wikipedia, youtube videos) in vain for this answer and yet I'm still stumped about just what is the actual ''energy'' being transferred from when after ATP leaves the ETC and then binds with a receptor...