What Are Endothermic & Exothermic Reactions

The video 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 each type are provided, along with explanations of physical processes like freezing and melting. The video concludes with a summary of key points, emphasizing the energy changes in these reactions.

What happens to the surroundings during an exothermic reaction?

• They become cooler.

• They become darker.

• They remain unchanged.

• They become warmer.

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

• Neutralization between acids and alkalis

• Boiling of water

• Photosynthesis

• Melting of ice

What is a characteristic of the energy curve in exothermic reactions?

• Energy of products is higher than reactants

• Energy of reactants is higher than products

• Energy remains constant

• Energy fluctuates randomly

Which process is an example of an endothermic reaction?

• Condensation

• Freezing

• Electrolysis

• Respiration

In endothermic reactions, how does the energy of the products compare to the reactants?

• Products have less energy

• Products have more energy

• Energy is unpredictable

• Energy is the same