Question

Breaking bonds such as those in Hydrogen peroxide gives off energy What was some proof that energy was released during this experiment?

Answer 1

You have not specified the experiment.......

Explanation:

And in addition, BREAKING BONDS requires energy. Whereas making bonds releases energy.

We know that hydrogen peroxide decomposes according to the equation......

`H_2O_2(l) stackrel(MnO_2)rarrH_2O(l) + 1/2O_2(g)uarr+Delta`

And that's the experimental result.......i.e. evolution of heat. While it does require energy to break the the `H-O` and (less `Delta`) `O-O` bonds, heat is released upon formation of strong `H-O` and `O=O` bonds. The balance of enthalpy change is negative, and the reaction gives an exotherm.

Often a little `Mn^(IV+)` salt is added to catalyze this reaction.

And please note that scientists do not deal in `"proof"`, they deal in `"evidence"`; and the evidence of such heat transfer is a rise in temperature of the reaction solvent.