   Chapter 3.2, Problem 3.1CYU

Chapter
Section
Textbook Problem

(a) Butane gas, C4H10, can burn completely in air [use O2(g) as the other reactant] to give carbon dioxide gas and water vapor. Write a balanced equation for this combustion reaction.(b) Write a balanced chemical equation for the complete combustion of C3H7BO3, a gasoline additive. The products of combustion are CO2(g), H2O(g), and B2O3(s).

(a)

Interpretation Introduction

Interpretation:

The balanced equation should be given for the combustion of butane gas to carbon dioxide.

Concept Introduction:

The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, therefore, the number of atoms present in the reactants is equal to the number of atoms present in the products.

Explanation

The unbalanced equation is given below using correct molecular formula, the given reaction is the combustion of butane gas to carbon dioxide and water vapor.

Balance the carbon atom in the given equation, when balancing the equation, we should not alter the subscripts and we can change coefficients.  There is four carbon atom in the left side and one carbon atom in the right side.  For balancing the carbon atom four molecules of carbon dioxide is added to the right side.  Therefore according to the carbon atom the balanced equation is given below.

Next, balance the hydrogen atom in the equation, there are ten hydrogen atom in the left side and two hydrogen atom in right side.  For the balancing the hydrogen atom, five molecules of water is added to the right side...

(b)

Interpretation Introduction

Interpretation:

The balanced equation should be given for the combustion gasoline (C3H7BO3(l)) additive.

Concept Introduction:

The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, therefore, the number of atoms present in the reactants is equal to the number of atoms present in the products.

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