Given the balanced equation representing a reaction:
cu + s==> cus + energy
which statement explains why the energy term is written to the right of the arrow?
(1) the compound cus is composed of two metals.
(2) the compound cus is composed of two nonmetals.
(3) energy is absorbed as the bonds in cus form.
(4) energy is released as the bonds in cus form.

4 is the right answer. When you form bonds energy is released, however if you were to break bonds energy is being absorbed. This scan be remembered in the simple mnemonic, BARF. Breaking, is  Absorbing, Releasing, is  Forming

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy

Idon't know hope someone you