Engineering English
Ideal Gas Law
Chemical Engineering · Last updated: July 30, 2026 · How this entry was written
Definition: The ideal gas law, PV = nRT, describes the relationship between pressure, volume, temperature, and amount of an ideal gas. It is a fundamental equation for estimating gas behavior under moderate conditions where intermolecular forces are negligible.
Example in context
“The engineer used the ideal gas law to calculate the volume of air required for the combustion reaction at the given temperature and pressure.”
“Mühendis, verilen sıcaklık ve basınçta yanma reaksiyonu için gerekli hava hacmini hesaplamak için ideal gaz yasasını kullandı.”
Where engineers use it
The ideal gas law is widely used in process engineering for sizing compressors, piping, and reactors. Engineers apply it to approximate gas densities and flow rates in systems where non-ideality corrections are minor.
Synonyms: ideal gas equation, perfect gas law
Antonyms: real gas law
Practice: can you use “Ideal Gas Law” at work?
A chemical engineer needs to design a vent line for a reactor operating at high temperature and moderate pressure. The gas mixture behaves nearly ideally. Use the ideal gas law to determine the volumetric flow rate from the mass flow rate.
Show a model answer
“Estimate the gas volume using the ideal gas law for a quick calculation.”
“Ideal Gas Law” in 21 languages
| English | Ideal Gas Law |
|---|---|
| Turkish | ideal gaz yasası |
| French | loi des gaz parfaits |
| German | ideales Gasgesetz |
| Spanish | ley de los gases ideales |
| Chinese | 理想气体定律 |
| Arabic | قانون الغاز المثالي |
| Portuguese | lei dos gases ideais |
| Russian | закон идеального газа |
| Japanese | 理想気体の法則 |
| Italian | legge dei gas ideali |
| Vietnamese | định luật khí lý tưởng |
| Hindi | आदर्श गैस नियम |
| Thai | กฎของแก๊สอุดมคติ |
| Indonesian | hukum gas ideal |
| Korean | 이상 기체 법칙 |
| Bengali | আদর্শ গ্যাস সূত্র |
| Dutch | ideale gaswet |
| Swedish | ideala gaslagen |
| Finnish | ideaalikaasun laki |
| Ukrainian | закон ідеального газу |
Frequently asked questions
What does Ideal Gas Law mean in engineering?
The ideal gas law, PV = nRT, describes the relationship between pressure, volume, temperature, and amount of an ideal gas. It is a fundamental equation for estimating gas behavior under moderate conditions where intermolecular forces are negligible. In Chemical Engineering, the term carries a usage-frequency rating of 10/10 in the Engineering English library.
How do you pronounce Ideal Gas Law?
Ideal Gas Law is pronounced /aɪˈdiːəl ɡæs lɔː/ (IPA). The Engineering English app plays audio for the term and checks your pronunciation with speech recognition.
How is Ideal Gas Law used in a sentence?
Example from an engineering context: “The engineer used the ideal gas law to calculate the volume of air required for the combustion reaction at the given temperature and pressure.”
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