How many liters of oxygen would be needed to produce 45.0 liters of carbon dioxide if the temperature and pressure for both are 22.0° C and 75.0 psi?

Feb 23, 2016

A precise volume of $45$ $L$.

Explanation:

At constant pressure, and constant temperature, equal volumes of gases contain an equal number of molecules; this is Avogadro's law of combining volumes.

Given that reaction has $1 : 1$ stoichiometry, i.e.

$C \left(s\right) + {O}_{2} \left(g\right) \rightarrow C {O}_{2} \left(g\right)$

If $45$ $L$ of oxygen were used, stoichiometry insists that $45$ $L$ of carbon dioxide were produced. This is a good thing, because using mixed units in questions like this (i.e. $\text{litres}$ and $\text{pounds per square inch}$) is simply asking for trouble.