Describe the amount of energy absorbed by the reactants and released by the products in an endothermic reaction

The enthalpy difference between the reactants and the products is equal to the amount of energy absorbed from the surroundings. A reaction in which energy is absorbed from the surroundings is called an endothermic reaction. ... Exothermic reactions heat up their surroundings while endothermic reactions cool them down.

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14 days is the half-life of phosphorus-32