The first law of thermodynamics states the conservation of energy and heat where the <span>total energy in an isolated system may be transformed into another, but never created or destroyed. If 314 J of energy was released to the room, then also 314 J of energy was also removed from food in that refrigerator assuming it is an isolated system. </span>
MgCl2 is a ionic compound because it is formed by a metal (Mg) and a non-metal (Cl)
Energy is used by plants to carry cellular respiration.
