atmolysis
Very Low / ObsoleteTechnical / Historical / Scientific
Definition
Meaning
The separation of gases or vapours of different densities by passing them through a porous partition.
A historical scientific process for separating mixed gases based on their differing rates of diffusion through a porous material, such as unglazed porcelain or graphite.
Linguistics
Semantic Notes
The term is largely obsolete in modern scientific literature, having been superseded by more precise terminology for separation techniques like diffusion, effusion, or chromatography. It refers specifically to a method, not the general principle of diffusion.
Dialectal Variation
British vs American Usage
Differences
No significant difference; the term is equally archaic and technical in both varieties.
Connotations
Historical scientific technique; evokes late 19th/early 20th century laboratory chemistry or physics.
Frequency
Extremely rare in both. Might appear in historical scientific texts or discussions of the history of gas physics.
Vocabulary
Collocations
Grammar
Valency Patterns
The atmolysis of [GAS MIXTURE]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Not used.
Academic
Only in historical contexts within the history of science or chemistry/physics.
Everyday
Never used.
Technical
Obsolete technical term; modern equivalents are preferred.
Examples
By Part of Speech
verb
British English
- The mixture was atmolyzed to isolate the lighter component.
American English
- They attempted to atmolyze the gaseous sample.
adjective
British English
- The atmolytic process was carefully documented.
American English
- An atmolytic apparatus was set up in the lab.
Examples
By CEFR Level
- Atmolysis is an old method for separating different gases.
- Scientists once used atmolysis in their experiments.
- In his 1884 paper, he described using atmolysis to separate oxygen from nitrogen, noting the differing diffusion rates.
- The historical technique of atmolysis relied on Graham's law, which states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass.
Learning
Memory Aids
Mnemonic
Think: 'ATMOsphere anaLYSIS' – analysing/separating the atmosphere (gases).
Conceptual Metaphor
A SIEVE FOR GASES: The porous partition acts like a sieve, but one that sorts by how quickly gas molecules slip through, not by size alone.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct translation. The Russian term 'атмолиз' is equally obscure. Do not confuse with 'анализ' (analysis). The process is specific, not general analysis.
Common Mistakes
- Using it to mean general atmospheric analysis (like weather).
- Confusing it with 'analysis' or 'electrolysis'.
- Using it as a current technical term.
Practice
Quiz
Atmolysis is best described as:
FAQ
Frequently Asked Questions
No, it is an obsolete scientific term. For modern contexts, terms like 'diffusion', 'effusion', or 'gas separation' are used.
Atmolysis separates gases through a porous barrier. Dialysis separates dissolved solutes (like ions or small molecules in a liquid) through a semi-permeable membrane.
The process is closely associated with the work of Thomas Graham (1805-1869), a Scottish chemist who studied the diffusion of gases, though the specific term was coined later.
It is not recommended. Using it would likely be seen as anachronistic. Use precise modern terminology like 'separation by differential diffusion' or reference 'Graham's law of effusion' instead.