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Enthalpy of dissociation and bond enthalpy?
Could somebody please clarify for me what the link between the two is?
Basically in a question you're given "Enthalpy of atomisation of chlorine = +121"
Then they ask you to calculate the bond enthalpy of a Cl-Cl bond. The answer they give is 242. I can see that's twice the enthalpy of atomisation of Cl, but I don't understand why.
Thanks for your help!
2 Answers
- Anonymous8 years agoFavorite Answer
Because the +121 is of 1 chlorine, whereas the bond has two chlorine. To calculate the enthalpy, you simply multiply it by two. Sometimes problems are quite simple, but we over think it. Hope it helps :)
- Anonymous8 years ago
I think its the same. If they telll u the enthalpy of one cl, then two will ve double