Give two everyday examples of endothermic reactions. When wood burns, the system proceeds toward minimum energy and the energy of the system decreases . Describe the energy levels of reactants and products in an exothermic reaction. The reactants are at a higher level than the products. In general, most chemical reactions release energy.
Energy is absorbed from the surroundings.
Less energy was released when new bonds formed than was required to break old bonds. Describe the energy levels of reactants and products in an endothermic reaction. The products are at a higher energy level. Give two everyday examples of endothermic reactions. Melting of ice, evaporation of water, boiling of water.