exothermic and endothermic reactions Flashcards
endothermic and exothermic reactions
What happens in an exothermic reaction?
In an exothermic reaction, energy is released as heat or light.
What happens in an endothermic reaction?
In an endothermic reaction, energy is absorbed. This makes the reaction feel cold.
How does a chemical reaction occur?
A chemical reaction occurs as the bonds between the atoms in the reactants break. The atoms then rearrange themselves to form a new bond, creating a new product. This also requires energy.
What determines if something is exothermic or endothermic?
The difference between the energy stored in the bonds in the reactants and the energy needed to make bonds in the products is what determines if a reaction will be exothermic or endothermic.
What is an exothermic reaction?
An exothermic reaction is a chemical reaction in which energy is released. The total chemical energy of the products is less than the total chemical energy of the reactants. Energy is lost to the surroundings making these reactions feel hot.
What is an endothermic reaction?
An endothermic reaction, a chemical reaction in which energy enters the reaction. The total chemical energy of the products is greater than the total chemical energy of the reactants. Energy is absorbed from the surroundings, and this makes the reaction feel cold.
