Chapter 13, Problem 13STP

Interpretation Introduction

Interpretation:

Volume of oxygen gas is to be calculated when it is used to combust a definite volume of acetylene gas.

Concept introduction:

The given reaction is combustion reaction. Volume-volume stochiometry and Avogadro’s Law will help to solve the problem

Answer to Problem 13STP

E

Explanation of Solution

According to Avogadro’s Law, equal volumes of all gases under specific temperature and pressure contain equal number of molecules.

The balanced chemical equation is given by:

$2{\mathrm{C}}_2{H}_2+5O_2\to 4C{O}_2+2H_{2}O$

The reaction shows that two liters of acetylene combines with five liters of oxygen in the balanced chemical equation.

Therefore volume of oxygen needed to combust $5.60L$ acetylene

$\begin{array}{l}=\frac{5}{2}\times 5.60\\ =14L\end{array}$

Conclusion

The numerical calculation shows option E is correct and remaining are wrong.