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GCSE Chemistry · key term
The area exposed at the surface of an object compared with its volume.
Used by AQA, Edexcel and OCR
Specification 4.2.4.1, 4.6.1.3 · Paper 1, Paper 2
The surface area of an object divided by its volume; it measures how much surface is exposed relative to the amount of material present.
Revise: Nanoparticle DimensionsThe important point is different: the small cube has more surface area for each unit of volume. This is its surface area to volume ratio.
The amount of exposed surface of a solid compared with its volume.
Specification 7.4, 9.36C · Paper 2
The area of a solid's exposed surface compared with its volume.
Revise: Factors Affecting RateBreaking a fixed amount of solid into smaller pieces leaves its total volume the same but exposes more surface. Its surface area to volume ratio therefore rises. More collisions can take place at that surface each second, so the reaction is faster.
The exposed surface area of an object divided by its volume.
The total exposed area of an object divided by the space it occupies.
Specification CM2.3v, C2.3h, C2.3j, C5.2e · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
The surface area of an object compared with its volume, calculated as surface area divided by volume.
Revise: Ratios in Surface AreaA surface area to volume ratio therefore depends on the size of the object; it is not a fixed property of a shape such as a cube.
A comparison of an object's surface area with its volume, written as surface area : volume.
The amount of a particle’s exposed surface compared with the space it occupies.
A solid’s surface area divided by its volume; it expresses how much surface is available for each unit of solid.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A comparison of a particle's surface area with its volume, usually written as surface area : volume.
Revise: Surface area to volume ratioThe smaller particle therefore has more surface area relative to each unit of volume: it has a higher surface area to volume ratio.
The amount of exposed surface area compared with the volume of a particle.
A comparison between the total area of an object's outside surface and the space occupied by the object.
A solid’s surface area divided by its volume; it compares how much surface is available with how much solid there is.
For a cube question, show both and before simplifying the surface area to volume ratio.
Link changed properties to the high surface area to volume ratio; do not merely state that nanoparticles are small.
If a side length decreases by a factor of 10, state that the surface area to volume ratio increases by a factor of 10.
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