24-25ThermoAP Chemistry

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings.

Front

What is an exothermic reaction?

Back

A reaction that releases energy to its surroundings.

Front

What happens to energy during an endothermic process?

Back

Energy is absorbed, leading to a decrease in temperature of the surroundings.

Front

What happens to energy during an exothermic process?

Back

Energy is released, leading to an increase in temperature of the surroundings.

Front

What is the significance of the energy of the products in a chemical reaction?

Back

It determines whether the reaction is endothermic or exothermic.

Front

How can you identify an endothermic reaction on a graph?

Back

The graph shows a rise in energy as the reaction progresses.

Front

How can you identify an exothermic reaction on a graph?

Back

The graph shows a drop in energy as the reaction progresses.

Front

What is the freezing of water classified as?

Back

Exothermic, because heat is released during the process.

Front

What is the melting of ice classified as?

Back

Endothermic, because heat is absorbed during the process.

Front

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

Back

It is the minimum energy required to initiate a reaction.