Exothermic & Endothermic Reactions

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy in the form of heat or light to its surroundings.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually in the form of heat.

Front

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

Back

The temperature of the surroundings increases because the reaction releases heat.

Front

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

Back

The temperature of the surroundings decreases because the reaction absorbs heat.

Front

Give an example of an exothermic reaction.

Back

Combustion of fuels, such as burning wood or fireworks.

Front

Give an example of an endothermic reaction.

Back

Photosynthesis in plants, where they absorb sunlight to convert carbon dioxide and water into glucose.

Front

What is the role of energy in chemical reactions?

Back

Energy is either absorbed or released during chemical reactions, determining whether the reaction is endothermic or exothermic.

Front

How can you tell if a reaction is exothermic based on temperature change?

Back

If the temperature of the reaction mixture increases, it is likely exothermic.

Front

How can you tell if a reaction is endothermic based on temperature change?

Back

If the temperature of the reaction mixture decreases, it is likely endothermic.

Front

What is the significance of activation energy in chemical reactions?

Back

Activation energy is the minimum energy required for a reaction to occur, regardless of whether it is exothermic or endothermic.