Surface activation prior to bonding has the typical advantage that no intermediate layer is needed and sufficiently high bonding energy is achieved after annealing at temperatures below 400 �C.
12.
It has the weakest metallic bonding of all, as indicated by its bonding energy ( 61 kJ / mol ) and melting point ( " 39 �C ) which, together, are the lowest of all the metallic elements.
13.
Basically, if you want to make it simple, your body causes chemical reactions to turn fat into carbon dioxide and water; since there is less energy in the bonds of the carbon dioxide and water than in the bonds of the fat, a small amount of bonding energy is released as heat.
