Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

7. Energy, Rate and Equilibrium

Endothermic & Exothermic Reactions

GOB Chemistry

7. Energy, Rate and Equilibrium

Endothermic & Exothermic Reactions

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1:51 minutes

Problem 69b

Textbook Question

Classify each of the following as exothermic or endothermic:
b. The energy level of the products is higher than that of the reactants.

Verified step by step guidance

Analyze the energy levels of the reactants and products. If the energy level of the products is higher than that of the reactants, it indicates that energy has been absorbed during the reaction.

Recall the definition of an endothermic reaction: an endothermic reaction absorbs energy from the surroundings, typically in the form of heat, resulting in an increase in the energy level of the products compared to the reactants.

Compare this to an exothermic reaction, where energy is released into the surroundings, and the energy level of the products is lower than that of the reactants.

Based on the given information, classify the reaction as endothermic because the energy level of the products is higher than that of the reactants, indicating energy absorption.

Conclude that the reaction is endothermic and explain that this classification is based on the energy flow and the relative energy levels of the reactants and products.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Exothermic Reactions

Exothermic reactions are chemical processes that release energy, usually in the form of heat, to the surroundings. In these reactions, the energy of the products is lower than that of the reactants, resulting in a net release of energy. Common examples include combustion and respiration, where energy is produced as a byproduct.

Endothermic Reactions

Endothermic reactions are chemical processes that absorb energy from the surroundings, leading to a decrease in temperature in the immediate environment. In these reactions, the energy level of the products is higher than that of the reactants, indicating that energy is required for the reaction to proceed. Photosynthesis is a classic example, where plants absorb sunlight to convert carbon dioxide and water into glucose.

Energy Level Diagrams

Energy level diagrams visually represent the energy changes during a chemical reaction. They illustrate the energy of reactants and products, showing whether a reaction is exothermic or endothermic. In an endothermic reaction, the diagram will show the products at a higher energy level than the reactants, indicating that energy has been absorbed during the reaction.