Hello, I am not sure whether it is the right place to post this but I am a bit confused about the bonding in chemistry and the binding energy in physics. From what I have read, in a nuclear fusion reaction, the released energy due to mass defect is converted to the kinetic energy of the product particles. However, in chemistry, the process is exothermic when bonds are formed, is it a similar process? Also, why would the energy released as heat instead of the kinetic energy of the product molecules? Thank you in advance.