Endothermic and Exothermic Reactions

The video tutorial explains the concept of chemical reactions, focusing on endothermic and exothermic reactions. Endothermic reactions absorb heat, while exothermic reactions release heat. Examples include melting ice for endothermic and lighting a match for exothermic. Photosynthesis is highlighted as an endothermic process where plants absorb heat energy. The tutorial emphasizes understanding reactions by following the movement of heat.

What is the main characteristic of an endothermic reaction?

• It changes color.

• It produces light.

• It absorbs heat.

• It releases heat.

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

• Melting ice

• Burning wood

• Lighting a match

• Rusting iron

What happens during an exothermic reaction?

• No heat change occurs.

• Heat is released.

• Heat is stored.

• Heat is absorbed.

Which process is an example of an exothermic reaction?

• Melting ice

• Photosynthesis

• Lighting a match

• Boiling water

Why is photosynthesis considered an endothermic process?

• It produces glucose.

• It absorbs sunlight.

• It releases carbon dioxide.

• It releases oxygen.