# The number of litres of air required to burn 8 litres of C2H2 is approximately?

##### 1 Answer

Jun 3, 2017

#### Answer:

We need a stoichiometric equation, ...................and get an approx. volume of

#### Explanation:

We need a stoichiometric equation to represent the combustion:

And thus given that at constant pressure, and constant temperature (conditions that must be reasonably assumed!), one volume of acetylene gas requires

And so, if there are

But we are not finished there (says he, finally reading the question!). The percentage of oxygen in air BY volume, is approx.

And thus we need a volume of ....