Ionic bond.
In the ionic bond one atom loses one or more electrons, leaving the atom with positive charge, and the other atom accepts those electrons standing with negative charge.
Though the hot cocoa would have a higher temperature, the lake would have more thermal energy because it has more molecules with a greater total internal energy.
It is wasted, most likely as light, in this case, or it is lost during the transport of electricity.
No because your opinion and beliefs answers many questions
