Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

3. Energy & Cell Processes

Chemical Reactions

Anatomy & Physiology

3. Energy & Cell Processes

Chemical Reactions

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2:47 minutes

Problem 9

Textbook Question

Which of the following chemical equations illustrates a typical decomposition reaction?
a. A + B → AB
b. AB + CD → AD + CB
c. 2A₂+ B₂ → 2A₂B
d. AB → A + B

Verified step by step guidance

Step 1: Understand the concept of a decomposition reaction. A decomposition reaction occurs when a single compound breaks down into two or more simpler substances. The general formula for a decomposition reaction is AB → A + B.

Step 2: Analyze each option provided in the problem. Look for the equation that matches the general formula of a decomposition reaction.

Step 3: Option a (A + B → AB) represents a synthesis reaction, where two reactants combine to form a single product. This is not a decomposition reaction.

Step 4: Option b (AB + CD → AD + CB) represents a double replacement reaction, where components of two compounds exchange places. This is not a decomposition reaction.

Step 5: Option c (2A₂ + B₂ → 2A₂B) represents a synthesis reaction, where reactants combine to form a single product. Option d (AB → A + B) matches the general formula of a decomposition reaction, as a single compound breaks down into simpler substances.

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Key Concepts

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

Decomposition Reaction

A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products. This process often requires energy input, such as heat, light, or electricity. An example is the breakdown of water into hydrogen and oxygen gases.

Chemical Equations

Chemical equations are symbolic representations of chemical reactions, showing the reactants and products along with their quantities. They follow the law of conservation of mass, meaning the number of atoms must remain the same on both sides of the equation. Understanding how to read and interpret these equations is crucial for identifying reaction types.

Types of Chemical Reactions

Chemical reactions can be classified into several types, including synthesis, decomposition, single replacement, and double replacement. Each type has distinct characteristics and patterns. Recognizing these types helps in predicting the products of reactions and understanding the underlying chemical processes.

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Related Videos

Related Practice

Textbook Question

Identify each reaction as one of the following:

a. A synthesis reaction

b. A decomposition reaction

c. An exchange reaction

(1) 2Hg + O₂ → 2HgO

(2) HCl + NaOH → NaCl + H₂O

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Textbook Question

Factors that increase the speed of chemical reactions include:

a. Increasing the temperature

b. Increasing the particle size

c. Increasing the concentration of the reactants

d. Catalysts

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Textbook Question

Identify each of the following reactions as a synthesis, decomposition, or exchange reaction:

2Hg + O₂ 2HgO

Fe²¹ + CuSO₄ → FeSO₄ + Cu²¹

HCl + NaOH → NaCl + H₂O

HNO₃ → H⁺ + NO₃⁻

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Textbook Question

What is the following type of decomposition reaction called?

ABCD + H₂O → ABCH + DOH

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Textbook Question

The speed, or rate, of a chemical reaction is influenced by

(a) The presence of catalysts

(b) The temperature

(d) a, b, and c are all correct

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Textbook Question

In an exergonic reaction,

(a) Large molecules are broken down into smaller ones.

(b) Small molecules are assembled into larger ones.

(d) Molecules move from reactants to products and back.

(e) Energy is released during the reaction.

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Textbook Question

Every year dozens of elderly people are found dead in their unheated apartments and listed as victims of hypothermia. What is hypothermia, and how does it kill? Why are the elderly more susceptible to hypothermia than the young?

Multiple Choice

Which of the following statements is true for all exergonic reactions?