Gas volumes
I can calculate the mass and the volume of a gas reactant/product given a balanced equation.
Gas volumes
I can calculate the mass and the volume of a gas reactant/product given a balanced equation.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Equal amounts in moles of gases occupy the same volume under the same conditions of temperature and pressure.
- The volume of one mole of any gas at room temperature and pressure (20℃ and 1 atmosphere pressure) is 24 dm³.
- The volumes of gaseous reactants and products can be calculated from the balanced equation for the reaction.
- If moles of gas are known, its density can be calculated using molar gas volume and the relationship mass = RFM x moles.
Keywords
Volume - is how much 3D space matter occupies. It is usually measured in cm³.
Moles - of something is 6.02 × 10²³ of it. The mass of a mole of a substance is its relative mass expressed in grams.
Molar gas volume - is the volume occupied by one mole of any gas. It is equal to 24 dm³ or 24 000 cm³ at room temperature and pressure.
Stoichiometry - refers to the molar ratio of the reactants and products in a chemical reaction.
Density - is a property of a substance and is its mass divided by its volume.
Common misconception
Pupils sometimes rush these calculations and forget to take note of the units.
Remind pupils that units provide the comparison standard for values. Much practice ensuring the correct molar gas volume value is used in calculations is necessary.
To help you plan your year 10 chemistry lesson on: Gas volumes, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 10 chemistry lesson on: Gas volumes, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 4 chemistry lessons from the Calculations involving masses unit, dive into the full secondary chemistry curriculum, or learn more about lesson planning.
Equipment
None required.
Licence
Lesson video
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Starter quiz
6 Questions
Exit quiz
6 Questions
The volume occupied by 1 mole of a gas
Unit for amount of substance
A measure of how much matter is located in a particular volume
How much 3D space matter occupies