Endothermic vs Exothermic Reactions Flashcard

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings, resulting in a decrease in temperature.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases heat to its surroundings, resulting in an increase in temperature.

Front

Give an example of an endothermic reaction.

Back

Photosynthesis is an example of an endothermic reaction, where plants absorb sunlight to convert carbon dioxide and water into glucose.

Front

Give an example of an exothermic reaction.

Back

Combustion of fuels, such as burning wood or gasoline, is an example of an exothermic reaction, where heat and light are released.

Front

In an exothermic reaction, what happens to the energy of the reactants?

Back

In an exothermic reaction, the energy of the reactants is higher than that of the products, and the excess energy is released as heat.

Front

In an endothermic reaction, what happens to the energy of the reactants?

Back

In an endothermic reaction, the energy of the reactants is lower than that of the products, and energy is absorbed from the surroundings.

Front

What is the role of heat in an exothermic reaction?

Back

In an exothermic reaction, heat is a product, meaning it is released into the environment.

Front

What is the role of heat in an endothermic reaction?

Back

In an endothermic reaction, heat is a reactant, meaning it is absorbed from the environment.

Front

How can you identify an exothermic reaction from a chemical equation?

Back

An exothermic reaction can be identified by the presence of energy (often in the form of heat) as a product in the chemical equation.

Front

How can you identify an endothermic reaction from a chemical equation?

Back

An endothermic reaction can be identified by the presence of energy (often in the form of heat) as a reactant in the chemical equation.