Identifying Exothermic and Endothermic Reactions

Front

What is an exothermic reaction?

Back

A chemical reaction that releases heat energy to its surroundings.

Front

What is an endothermic reaction?

Back

A chemical reaction that absorbs heat energy from its surroundings.

Front

Give an example of an exothermic reaction.

Back

Burning of wood.

Front

Give an example of an endothermic reaction.

Back

Cooking an egg.

Front

What happens to the temperature of the surroundings during an exothermic reaction?

Back

The temperature increases.

Front

What happens to the temperature of the surroundings during an endothermic reaction?

Back

The temperature decreases.

Front

What is the main difference between exothermic and endothermic reactions?

Back

Exothermic reactions release heat energy, while endothermic reactions absorb heat energy.

Front

What is photosynthesis in plants? Is it exothermic or endothermic?

Back

Photosynthesis is an endothermic reaction as it absorbs light energy.

Front

What is the role of heat in exothermic reactions?

Back

Heat is released as a product of the reaction.

Front

What is the role of heat in endothermic reactions?

Back

Heat is required as a reactant for the reaction to occur.