Investigating Chemical Reactions: Energy and Chemical Reactions

The video tutorial explains how energy is involved in chemical reactions, either being absorbed or released. It distinguishes between exothermic reactions, where energy and often light are released, and endothermic reactions, where energy is absorbed. The video also discusses the varying rates of chemical reactions, influenced by factors such as reactant concentration, temperature, and surface area.

What type of reaction occurs when wood burns?

• Endothermic reaction

• Catalytic reaction

• Exothermic reaction

• Neutral reaction

In an exothermic reaction, what is often released along with energy?

• Water

• Light

• Gas

• Sound

Which of the following is an example of an endothermic reaction?

• Melting ice

• Rusting of metal

• Burning wood

• Using a cold pack

Which factor does NOT affect the speed of a chemical reaction?

• Concentration of reactants

• Surface area

• Temperature

• Color of reactants

Which reaction is typically faster?

• Photosynthesis

• Rusting of metal

• Explosion of fireworks

• Formation of a cold pack