IG-Energy Changes

Front

What is an exothermic reaction?

Back

A reaction that releases energy in the form of heat to the surroundings.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from the surroundings, resulting in a decrease in temperature.

Front

What is activation energy?

Back

The minimum energy required to start a chemical reaction.

Front

Give an example of an exothermic process.

Back

Burning petrol in a car engine.

Front

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

Back

The temperature of the surroundings increases.

Front

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

Back

The temperature of the surroundings decreases.

Front

In an endothermic reaction, how does the energy of the products compare to the reactants?

Back

The products have more energy than the reactants.

Front

What is the difference between exothermic and endothermic reactions?

Back

Exothermic reactions release energy, while endothermic reactions absorb energy.

Front

What is an example of an endothermic process?

Back

Photosynthesis in plants.

Front

What is the role of activation energy in a chemical reaction?

Back

It is the energy needed to break bonds in the reactants to initiate the reaction.