2023 Exothermic and 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.

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

Give an example of an exothermic reaction.

Back

Fireworks exploding is an example of an exothermic reaction.

Front

Give an example of an endothermic reaction.

Back

Photosynthesis is an example of an endothermic reaction, where plants absorb energy from sunlight.

Front

What happens to temperature during an exothermic reaction?

Back

The temperature of the surroundings increases during an exothermic reaction.

Front

What happens to temperature during an endothermic reaction?

Back

The temperature of the surroundings decreases during an endothermic reaction.

Front

What is the role of energy in chemical reactions?

Back

Energy is either absorbed or released during chemical reactions, determining whether they are endothermic or exothermic.

Front

What is the chemical equation for photosynthesis?

Back

6CO2 + 6H2O + Energy -> C6H12O6 + 6O2.

Front

What is rusting of iron?

Back

Rusting of iron is an exothermic reaction where iron reacts with oxygen and moisture, releasing heat.

Front

How can you identify an exothermic reaction from a graph?

Back

In a graph, an exothermic reaction shows a decrease in energy or temperature over time.