Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Write a balanced molecular equation for the complete combustion (in the presence of excess oxygen) of:
![### Balancing Chemical Equations: Combustion Reaction of Paraffin Wax
**Example Problem:**
- **Question:** Is your reaction completely balanced? You should end up with 22 water molecules in the products. Did you include all physical states?
- **Substance to Balance:**
(c) \( \text{C}_{21}\text{H}_{44} \) (a component of paraffin wax used in candles)
- **Requirement:** Include physical states in your answer.
**Chemical Equation:**
\[
\text{C}_{21}\text{H}_{44}(s) + 32\text{O}_{2}(g) \rightarrow 21\text{CO}_{2}(g) + 22\text{H}_{2}\text{O}(l)
\]
**Explanation of Physical States:**
- \( (s) \) denotes a solid, referring to paraffin wax.
- \( (g) \) stands for gas, applicable to both oxygen and carbon dioxide.
- \( (l) \) indicates a liquid, which in this case is water.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F87a4569a-2544-46d2-ac6c-945fc7626042%2F45123148-7d74-4226-846c-4faebc722ded%2Flilnq3i_processed.png&w=3840&q=75)
Transcribed Image Text:### Balancing Chemical Equations: Combustion Reaction of Paraffin Wax
**Example Problem:**
- **Question:** Is your reaction completely balanced? You should end up with 22 water molecules in the products. Did you include all physical states?
- **Substance to Balance:**
(c) \( \text{C}_{21}\text{H}_{44} \) (a component of paraffin wax used in candles)
- **Requirement:** Include physical states in your answer.
**Chemical Equation:**
\[
\text{C}_{21}\text{H}_{44}(s) + 32\text{O}_{2}(g) \rightarrow 21\text{CO}_{2}(g) + 22\text{H}_{2}\text{O}(l)
\]
**Explanation of Physical States:**
- \( (s) \) denotes a solid, referring to paraffin wax.
- \( (g) \) stands for gas, applicable to both oxygen and carbon dioxide.
- \( (l) \) indicates a liquid, which in this case is water.
![**Review Problem 5.075**
**Objective:** Write a balanced molecular equation for the complete combustion (in the presence of excess oxygen) of:
**(a)** \( \text{C}_{6}\text{H}_{6} \) (benzene, an important industrial chemical and solvent). Include physical states in your answer.
- **Incorrect.** Is your reaction completely balanced? You should end up with 6 water molecules in the products. Did you include all physical states?
**Equation:**
\[
2\text{C}_{6}\text{H}_{6}(g) + 15\text{O}_{2}(g) \rightarrow 12\text{CO}_{2}(g) + 6\text{H}_{2}\text{O}(l)
\]
**(b)** \( \text{C}_{4}\text{H}_{10} \) (butane, a fuel used in cigarette lighters). Include physical states in your answer.
- **Incorrect.** Is your reaction completely balanced? You should end up with 10 water molecules in the products. Did you include all physical states?
**Equation:**
\[
2\text{C}_{4}\text{H}_{10}(g) + 13\text{O}_{2}(g) \rightarrow 8\text{CO}_{2}(g) + 10\text{H}_{2}\text{O}(l)
\]
**Note:** Ensure that each equation is balanced with respect to the number of atoms for each element on both sides, and consider the physical states: (g) for gases and (l) for liquids.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F87a4569a-2544-46d2-ac6c-945fc7626042%2F45123148-7d74-4226-846c-4faebc722ded%2F0murq4f_processed.png&w=3840&q=75)
Transcribed Image Text:**Review Problem 5.075**
**Objective:** Write a balanced molecular equation for the complete combustion (in the presence of excess oxygen) of:
**(a)** \( \text{C}_{6}\text{H}_{6} \) (benzene, an important industrial chemical and solvent). Include physical states in your answer.
- **Incorrect.** Is your reaction completely balanced? You should end up with 6 water molecules in the products. Did you include all physical states?
**Equation:**
\[
2\text{C}_{6}\text{H}_{6}(g) + 15\text{O}_{2}(g) \rightarrow 12\text{CO}_{2}(g) + 6\text{H}_{2}\text{O}(l)
\]
**(b)** \( \text{C}_{4}\text{H}_{10} \) (butane, a fuel used in cigarette lighters). Include physical states in your answer.
- **Incorrect.** Is your reaction completely balanced? You should end up with 10 water molecules in the products. Did you include all physical states?
**Equation:**
\[
2\text{C}_{4}\text{H}_{10}(g) + 13\text{O}_{2}(g) \rightarrow 8\text{CO}_{2}(g) + 10\text{H}_{2}\text{O}(l)
\]
**Note:** Ensure that each equation is balanced with respect to the number of atoms for each element on both sides, and consider the physical states: (g) for gases and (l) for liquids.
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