What Are Endothermic & Exothermic Reactions

This video tutorial explains exothermic and endothermic reactions, highlighting their differences in energy transfer. Exothermic reactions release energy, causing surroundings to heat up, while endothermic reactions absorb energy, making surroundings cooler. Examples of exothermic reactions include neutralization and respiration, whereas endothermic reactions include electrolysis and photosynthesis. The video also covers physical processes like melting and freezing, explaining their energy dynamics. Key points include the energy curves and the commonality of exothermic reactions.

What happens to the surroundings during an exothermic reaction?

• They become cooler.

• They become warmer.

• They emit light.

• They remain unchanged.

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

• Photosynthesis

• Respiration

• Boiling water

• Melting ice

How can you detect an exothermic reaction using a thermometer?

• The temperature decreases.

• The temperature remains constant.

• The temperature increases.

• The thermometer breaks.

What is a common characteristic of endothermic reactions?

• They do not involve energy changes.

• They absorb energy from the surroundings.

• They always produce light.

• They release energy to the surroundings.

Which process is an example of an endothermic reaction?

• Condensation

• Freezing

• Neutralization

• Electrolysis