Chapter 11.2, Problem 18SP

(a)

Interpretation Introduction

Interpretation: To determine the balance of chemical reactions.

Concept Introduction: The type of chemical reaction in which the count of atoms will be identical on both sides of the reaction is named a balanced chemical reaction.

Answer to Problem 18SP

The balanced complete reaction will be $\text{HCHO}\left(\text{g}\right){\text{ +O}}_{\text{2}}\left(\text{g}\right)\to {\text{CO}}_{\text{2}}\left(\text{g}\right){\text{ + H}}_{\text{2}}\text{O(l)}$

Explanation of Solution

The complete combustion of formaldehyde will give carbon dioxide and water. Therefore, the balanced chemical equation can be written as:

  $\text{HCHO}\left(\text{g}\right){\text{ +O}}_{\text{2}}\left(\text{g}\right)\to {\text{CO}}_{\text{2}}\left(\text{g}\right){\text{ + H}}_{\text{2}}\text{O(l)}$

(b)

Interpretation Introduction

Interpretation: To determine the balance of chemical reactions.

Concept Introduction: The type of chemical reaction in which the count of atoms will be identical on both sides of the reaction is named a balanced chemical reaction.

Answer to Problem 18SP

The balanced complete reaction will be ${\text{C}}_{\text{7}}{\text{H}}_{\text{16}}\left(\text{l}\right){\text{+11O}}_{\text{2}}\left(\text{g}\right)\to {\text{7 CO}}_{\text{2}}\left(\text{g}\right){\text{ + 8 H}}_{\text{2}}\text{O(l)}$

Explanation of Solution

The complete combustion of heptane will give carbon dioxide and water. Therefore, the balanced chemical equation can be written as:

  ${\text{C}}_{\text{7}}{\text{H}}_{\text{16}}\left(\text{l}\right){\text{+11O}}_{\text{2}}\left(\text{g}\right)\to {\text{7 CO}}_{\text{2}}\left(\text{g}\right){\text{ + 8 H}}_{\text{2}}\text{O(l)}$

(e)

Interpretation Introduction

Interpretation: To determine the balance of chemical reactions.

Concept Introduction: The type of chemical reaction in which the count of atoms will be identical on both sides of the reaction is named a balanced chemical reaction.

Answer to Problem 18SP

The balanced complete reaction will be ${\text{2C}}_{\text{6}}{\text{H}}_{\text{6}}\left(\text{l}\right){\text{+15 O}}_{\text{2}}\left(\text{g}\right)\to {\text{12 CO}}_{\text{2}}\left(\text{g}\right){\text{ + 6 H}}_{\text{2}}\text{O(l)}$

Explanation of Solution

The complete combustion of benzene will give carbon dioxide and water. Therefore, the balanced chemical equation can be written as:

  ${\text{2C}}_{\text{6}}{\text{H}}_{\text{6}}\left(\text{l}\right){\text{+15 O}}_{\text{2}}\left(\text{g}\right)\to {\text{12 CO}}_{\text{2}}\left(\text{g}\right){\text{ + 6 H}}_{\text{2}}\text{O(l)}$