molecular volume: meaning, definition, pronunciation and examples
C2 (Very Low Frequency in General English)Technical/Scientific
Quick answer
What does “molecular volume” mean?
The volume occupied by one mole of a substance under specific conditions.
Audio
Pronunciation
Definition
Meaning and Definition
The volume occupied by one mole of a substance under specific conditions.
In physical chemistry, it's a measure of the space occupied by a specific number of molecules (typically one mole, Avogadro's number), often used to understand packing, density, and intermolecular forces in gases, liquids, and solids. It is calculated as the molar mass divided by the density.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling follows respective conventions (e.g., 'molecular' vs. 'molecular'—no difference here, but related terms like 'litre/liter' may appear in explanations).
Connotations
Purely technical with no regional connotative differences.
Frequency
Equally low-frequency and specialised in both varieties, confined to scientific and engineering contexts.
Grammar
How to Use “molecular volume” in a Sentence
The molecular volume of [SUBSTANCE] is [VALUE].To calculate/find/determine the molecular volume.A high/low molecular volume indicates...Vocabulary
Collocations
Examples
Examples of “molecular volume” in a Sentence
adjective
British English
- The molecular-volume data was crucial for the model.
American English
- The molecular volume data was crucial for the model.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Core term in chemistry, physics, and materials science lectures, textbooks, and research papers.
Everyday
Not used in everyday conversation.
Technical
Essential in chemical engineering, physical chemistry, thermodynamics, and fluid dynamics for property calculations and modelling.
Vocabulary
Synonyms of “molecular volume”
Neutral
Weak
Vocabulary
Antonyms of “molecular volume”
Watch out
Common Mistakes When Using “molecular volume”
- Using it to refer to the volume of an individual molecule. Confusing it with atomic volume or specific volume. Forgetting it is temperature and pressure dependent for gases.
FAQ
Frequently Asked Questions
Yes, in standard scientific usage, 'molecular volume' and 'molar volume' are synonymous. 'Molar volume' is perhaps slightly more common.
Yes, it is commonly measured or calculated for solids, liquids, and gases, though for gases it is highly dependent on temperature and pressure.
It is a fundamental property that relates mass to space, crucial for understanding densities, designing chemical processes, predicting phase behaviour, and studying intermolecular forces.
The standard SI unit is cubic metres per mole (m³/mol), but cubic centimetres per mole (cm³/mol) or litres per mole (L/mol) are very commonly used in chemistry.
The volume occupied by one mole of a substance under specific conditions.
Molecular volume is usually technical/scientific in register.
Molecular volume: in British English it is pronounced /məˌlek.jə.lə ˈvɒl.juːm/, and in American English it is pronounced /məˌlek.jə.lɚ ˈvɑːl.jəm/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of a MOLE of molecules (a huge, specific number) crammed into a box. The size of that box is the MOLecular VOLume.
Conceptual Metaphor
SPACE AS A CONTAINER FOR PARTICLES / AMOUNT AS SIZE.
Practice
Quiz
What does 'molecular volume' specifically refer to?