Energy changes

What is energy change in a chemical reaction?

Energy change in a chemical reaction refers to the difference in energy between reactants and products, typically involving the release or absorption of energy.

What is an exothermic reaction?

An exothermic reaction is a chemical reaction that releases energy in the form of heat, causing the surrounding temperature to rise.

What is an endothermic reaction?

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually resulting in a decrease in temperature.

What is activation energy?

Activation energy is the minimum energy required for a chemical reaction to occur.

How do enzymes affect energy changes in reactions?

Enzymes lower the activation energy needed for reactions, thus speeding up the rate of reactions without being consumed.

What is a catalyzed reaction?

A catalyzed reaction is one that occurs in the presence of a catalyst, which speeds up the reaction without being changed by the reaction.

How does temperature influence energy changes in reactions?

Increasing temperature generally increases the kinetic energy of molecules, leading to more frequent and effective collisions that can alter energy changes.

What is the relationship between potential energy and kinetic energy during energy changes?

Potential energy is stored energy, and as it is converted to kinetic energy, it results in motion during energy changes in systems.

What is the principle of conservation of energy?

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

What role do thermochemical equations play in energy changes?

Thermochemical equations indicate the energy change associated with a reaction, showing the enthalpy change along with the reaction.