Endothermic and Exothermic Processes

Endothermic and Exothermic Processes

Read each question carefully and provide your best answer. For multiple choice questions, circle the correct option. For fill-in-the-blank questions, complete the statement with the most appropriate term. For short answer questions, provide a concise and accurate response.

1. Which of the following best describes an exothermic reaction?

2. In an endothermic reaction, the enthalpy change (ΔH) is typically:

3. Photosynthesis is an example of an   process, as it requires energy from sunlight.

4. When a chemical bond is formed, energy is typically  , making it an   process.

5. Freezing water into ice is an exothermic process.

6. The activation energy for an exothermic reaction is always higher than that for an endothermic reaction.

7. Briefly explain the difference between endothermic and exothermic reactions in terms of energy flow and temperature change of the surroundings.

8. Describe a real-world application or example of an endothermic process and an exothermic process.

Use the words below to complete the sentences.

9. An endothermic reaction   heat from the  , causing the temperature of the surroundings to decrease.

10. The change in   is a key indicator of whether a reaction is endothermic or exothermic.

11. Sketch a potential energy diagram for an exothermic reaction, clearly labeling the reactants, products, activation energy, and enthalpy change (ΔH).