combined gas law
E480766
The combined gas law is a fundamental gas equation in physics and chemistry that relates pressure, volume, and temperature of a fixed amount of gas by merging Boyle’s, Charles’s, and Gay-Lussac’s laws into a single relationship.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
empirical law
ⓘ
gas law ⓘ physical law ⓘ |
| alsoKnownAs | general gas equation (for fixed n) ⓘ |
| appliesTo | ideal gas ⓘ |
| approximateValidity |
low pressure
ⓘ
moderate temperature ⓘ |
| assumes |
fixed amount of gas
ⓘ
gas molecules have negligible volume ⓘ negligible intermolecular forces ⓘ no phase change of gas ⓘ |
| breaksDownWhen |
very high pressure
ⓘ
very low temperature ⓘ |
| category | classical thermodynamics concept ⓘ |
| componentLaw |
Boyle's law
NERFINISHED
ⓘ
Charles's law NERFINISHED ⓘ Gay-Lussac's law NERFINISHED ⓘ |
| derivedFrom |
Boyle's law
NERFINISHED
ⓘ
Charles's law NERFINISHED ⓘ Gay-Lussac's law NERFINISHED ⓘ |
| dimension | relates intensive and extensive thermodynamic variables ⓘ |
| educationalLevel |
high school chemistry
ⓘ
introductory college physics ⓘ |
| expressesConservation | PV/T for a fixed amount of gas remains constant ⓘ |
| field |
chemistry
ⓘ
physics ⓘ |
| historicalContext | developed after individual gas laws were established ⓘ |
| implies |
if pressure is constant then V1 / T1 = V2 / T2
ⓘ
if temperature is constant then P1 V1 = P2 V2 ⓘ if volume is constant then P1 / T1 = P2 / T2 ⓘ |
| mathematicalRelation |
P is directly proportional to T at constant V
ⓘ
P is inversely proportional to V at constant T ⓘ V is directly proportional to T at constant P ⓘ |
| quantityHeldConstant | amount of substance (n) ⓘ |
| relatedTo | ideal gas law NERFINISHED ⓘ |
| relatesQuantity |
pressure
ⓘ
temperature ⓘ volume ⓘ |
| symbolicForm |
P V / T = constant
ⓘ
P1 V1 / T1 = P2 V2 / T2 ⓘ |
| temperatureUnitRequirement | Kelvin NERFINISHED ⓘ |
| usedFor |
introductory thermodynamics education
ⓘ
predicting final state of a gas ⓘ solving gas expansion problems ⓘ |
| usedIn |
engineering gas systems analysis
ⓘ
laboratory gas calculations ⓘ |
| usesTemperatureScale | absolute temperature ⓘ |
| validWhen | gas behaves ideally ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.