gas law: meaning, definition, pronunciation and examples
LowAcademic / Technical
Quick answer
What does “gas law” mean?
A scientific principle that describes the relationship between the pressure, volume, temperature, and amount (number of moles) of a gas.
Audio
Pronunciation
Definition
Meaning and Definition
A scientific principle that describes the relationship between the pressure, volume, temperature, and amount (number of moles) of a gas.
Any of several specific, mathematically expressed laws (such as Boyle's Law or Charles's Law) that model the behaviour of gases under changing conditions, often combined into a single ideal gas law.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling of related terms may differ (e.g., 'behaviour' vs. 'behavior').
Connotations
Purely technical and neutral in both varieties.
Frequency
Used with identical frequency in relevant academic and scientific contexts.
Grammar
How to Use “gas law” in a Sentence
The [specific name] gas law states that...According to the gas law, ...We can calculate [variable] using the gas law.Vocabulary
Collocations
Examples
Examples of “gas law” in a Sentence
adjective
British English
- The gas law calculations were complex.
- We reviewed the gas law equations.
American English
- The gas law calculations were complex.
- We reviewed the gas law equations.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Core term in chemistry and physics textbooks, lectures, and research papers.
Everyday
Extremely rare outside educational or scientific discussion.
Technical
Essential terminology in engineering (e.g., chemical, mechanical), laboratory science, and thermodynamics.
Vocabulary
Synonyms of “gas law”
Strong
Neutral
Weak
Watch out
Common Mistakes When Using “gas law”
- Using 'gas law' to refer to regulations about natural gas supply. Treating 'gas law' as an uncountable noun (e.g., 'we studied gas law' is acceptable, but 'a gas law' is more precise for a specific principle). Confusing one specific gas law (e.g., Boyle's) with the combined ideal gas law.
FAQ
Frequently Asked Questions
Not exactly. 'The gas law' can refer to any specific law describing gas behaviour (like Boyle's Law). 'The ideal gas law' (PV=nRT) is a specific, combined equation that integrates several simpler gas laws.
The simple, classic gas laws are best approximations for ideal gases (which have no volume and no intermolecular forces). Real gases deviate from these laws, especially at high pressure and low temperature, which is addressed by more complex equations like van der Waals'.
For most introductory courses, understanding the relationships (e.g., pressure vs. volume, volume vs. temperature) and mastering the ideal gas law (PV=nRT) is sufficient, as it can derive the others.
'R' is the universal gas constant. It is a proportionality constant that makes the equation PV=nRT dimensionally consistent and allows it to work with standard units of pressure, volume, moles, and temperature.
A scientific principle that describes the relationship between the pressure, volume, temperature, and amount (number of moles) of a gas.
Gas law is usually academic / technical in register.
Gas law: in British English it is pronounced /ˈɡæs ˌlɔː/, and in American English it is pronounced /ˈɡæs ˌlɔ/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Remember PV = nRT: Pressure and Volume are directly related to the Number of moles and the gas constant (R) times Temperature.
Conceptual Metaphor
A RULEBOOK FOR GAS PARTICLES: Gas laws are the rules that govern how gas molecules interact with their container and each other when conditions change.
Practice
Quiz
Which of the following is NOT a specific gas law?