Endothermic and Exothermic Reactions

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 exothermic reaction.

Back

An example of an exothermic reaction is the reaction between hydrochloric acid (HCl) and zinc (Zn), which releases heat.

Front

What happens to the temperature during an endothermic reaction?

Back

The temperature decreases during an endothermic reaction as heat is absorbed from the surroundings.

Front

What happens to the temperature during an exothermic reaction?

Back

The temperature increases during an exothermic reaction as heat is released to the surroundings.

Front

What is the significance of the heat of reaction?

Back

The heat of reaction indicates whether a reaction is endothermic or exothermic, based on the heat absorbed or released.

Front

How can you identify an endothermic reaction based on temperature change?

Back

An endothermic reaction can be identified by a decrease in temperature of the surroundings.

Front

How can you identify an exothermic reaction based on temperature change?

Back

An exothermic reaction can be identified by an increase in temperature of the surroundings.

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

What is an example of an endothermic process?

Back

An example of an endothermic process is the melting of ice, which absorbs heat.