chemisorption: meaning, definition, pronunciation and examples
C2+Technical / Scientific
Quick answer
What does “chemisorption” mean?
The binding of a gas or dissolved substance to a solid surface via chemical bonding.
Audio
Pronunciation
Definition
Meaning and Definition
The binding of a gas or dissolved substance to a solid surface via chemical bonding.
A type of adsorption involving strong chemical interactions between the adsorbate and the surface, distinct from weaker physical adsorption (physisorption). The process is typically characterized by high heat of adsorption and irreversibility.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. Both use the same spelling 'chemisorption', unlike some '-ise'/-'ize' variations.
Connotations
None beyond the technical meaning.
Frequency
Equally rare and confined to technical domains in both varieties.
Grammar
How to Use “chemisorption” in a Sentence
The chemisorption of [GAS] on [MATERIAL][MATERIAL] exhibits chemisorption of [GAS]Chemisorption occurs at [CONDITION]Vocabulary
Collocations
Examples
Examples of “chemisorption” in a Sentence
verb
British English
- The hydrogen molecules are believed to chemisorb onto the platinum surface.
- The study examines how nitrogen chemisorbs at different temperatures.
American English
- Oxygen will chemisorb on the fresh aluminum surface, forming a layer.
- Researchers modeled how CO chemisorbs on the catalyst.
adverb
British English
- The gas bonded chemisorptively to the substrate.
- Not used frequently.
American English
- The species is bound chemisorptively, not reversibly.
- Not used frequently.
adjective
British English
- The chemisorptive properties of the new alloy were remarkable.
- They measured the chemisorptive capacity of the material.
American English
- A chemisorptive bond is much stronger than a physisorptive one.
- The process is chemisorptive in nature.
Usage
Meaning in Context
Business
Not used.
Academic
Used in research papers, theses, and advanced textbooks in chemistry, chemical engineering, and materials science.
Everyday
Never used.
Technical
Core term in catalysis, surface science, sensor technology, and gas purification processes.
Vocabulary
Synonyms of “chemisorption”
Neutral
Weak
Vocabulary
Antonyms of “chemisorption”
Watch out
Common Mistakes When Using “chemisorption”
- Using 'chemisorption' to describe any type of adsorption.
- Pronouncing it /ˈkɛmɪˌsɔːpʃən/ (with primary stress on the first syllable). Correct is /ˌkɛmɪˈsɔːpʃən/.
FAQ
Frequently Asked Questions
No, chemisorption typically involves strong chemical bonds and is not easily reversed by simply reducing pressure; it often requires significant energy input (e.g., high temperature).
Chemisorption is always exothermic, meaning it releases heat, often a substantial amount.
It is crucial in heterogeneous catalysis, surface science, corrosion studies, semiconductor fabrication, and the design of chemical sensors and gas storage materials.
Yes, it requires a surface with specific active sites capable of forming chemical bonds. Not all surfaces will induce chemisorption for a given gas.
The binding of a gas or dissolved substance to a solid surface via chemical bonding.
Chemisorption is usually technical / scientific in register.
Chemisorption: in British English it is pronounced /ˌkɛmɪˈsɔːpʃən/, and in American English it is pronounced /ˌkɛmɪˈsɔːrpʃən/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of CHEMical + adSORPTION = CHEMISORPTION. It's a chemical handshake, not just a physical touch, between a molecule and a surface.
Conceptual Metaphor
A molecule forming a permanent alliance with a surface (vs. a temporary visit in physisorption).
Practice
Quiz
What primarily distinguishes chemisorption from physisorption?