Molar Volume of a Gas

Part of the Stoichiometry section of Coddy's Chemistry journey. Lesson 7 of 41.

A gas is mostly empty space, so its volume depends on how many particles it has, not on what they are.

At room conditions ( $25\ ^{\circ}\mathrm{C}$ , $1\ \mathrm{atm}$ ) one mole of any gas takes about $25\ \mathrm{L}$ : the molar volume V_m.

Two equal containers of 25 L: one mole of helium and one mole of carbon dioxide

One mole of any gas: 25 L at room conditions

For $n$ moles:

$V = n \times V_m$

Two moles of oxygen take $50\ \mathrm{L}$ . The rule is for gases only.

Challenge

A bottle of sparkling water releases $0.4\ \mathrm{mol}$ of carbon dioxide gas into the room. What volume $V$ does the gas take at room conditions?

Try it yourself

Solve for $V$

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Stoichiometry

1The Mole

4Equations and Mole Ratios

2Gases

5Limiting Reactant

3Solutions

6Practice Problems