What happens to the bonds of substance during a chemical reaction?

Answer 1

First chemicals bonds in the starting substances must break. Molecules are always moving. If the molecules bump into each other with enough energy,the chemical bonds in the molecules break. ;)

Answer 2

During a chemical reaction, the bonds of substances are broken and rearranged to form new compounds. Existing bonds are either broken (in the case of reactants) or formed (in the case of products) as atoms are rearranged to create new chemical species. This process involves the transfer, sharing, or redistribution of electrons between atoms.