I-Calculator ye-Ideal Gas Law
I-PV = nRT yeyiphi na into etshintshayo, kwindlela okhetha ngayo uxinzelelo, ubukhulu kunye neyunithi yobushushu.
Iinketho ze projekti
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The ideal gas law ties together the four state variables of a gas in one equation, PV = nRT: pressure times volume equals the number of moles times the gas constant times the absolute temperature. The constant R = 8.314462618 J/(mol·K) in SI units. Rearranged, you can solve for any variable — P = nRT/V, V = nRT/P, n = PV/RT or T = PV/nR — and this calculator does exactly that, converting pressure (Pa, kPa, bar, atm, mmHg, psi), volume (m³, L, mL, cm³) and temperature (K, °C, °F) internally so you can work in whatever units you have.
The classic worked example is one mole of gas at standard temperature and pressure: at 0 °C (273.15 K) and 1 atm, V = nRT/P = 1 × 8.314 × 273.15 / 101,325 ≈ 0.0224 m³, or the familiar 22.4 litres per mole. Heat that gas to 300 K at constant pressure and the volume rises in proportion, since V ∝ T. A crucial detail: temperature must be absolute — always convert °C or °F to kelvin (add 273.15 to °C) before the math, which the calculator handles for you.
The law is called "ideal" because it assumes gas molecules have no volume and do not attract one another. Real gases follow it closely at ordinary pressures and temperatures well above their boiling point, and it is the everyday tool for scuba and diving gas calculations, chemistry stoichiometry of gases, HVAC and pneumatics, and estimating how a balloon or tyre responds to heating and cooling. It becomes less accurate at very high pressure or near condensation, where equations like van der Waals do better.
Imibuzo ebuza rhoqo
Yintoni umthetho wegesi efanelekileyo?
PV = nRT idibanisa uxinzelelo, ubukhulu, iimoles kunye nobushushu begesi efanelekileyo nge constant R = 8.314 J/ (mol· K). Yenza kwakhona ukusombulula nasiphi na isiguquki esifanayo.
Ziziphi iiyunithi ezichanekileyo?
Internally everything is SI — pascals, cubic metres, moles and kelvin — with R = 8.314. One mole of gas at 0 °C (273.15 K) and 1 atm occupies about 22.4 L (0.0224 m³). Enter any units you like; the calculator converts for you.
Kutheni umqondo wobushushu kufuneka ube kwi-kelvin?
PV = nRT isebenzisa ubushushu obupheleleyo, apho 0 K ngu zero opheleleyo. Celsius ne Fahrenheit zinee zero ezingenamthetho, ngoko ukufaka kwi °C ngokuthe ngqo kunika izimvo ezingalunganga. Yongeza 273. 15 kwi °C ukufumana i kelvin - i kalkuleta iyenza ngokuzenzekelayo.
Yintoni i-STP kunye nobukhulu bemolar?
Ubushushu obuqhelekileyo kunye noxinzelelo luhlala luyi-0 °C ne-1 atm, apho i-mole enye yegesi efanelekileyo ithatha malunga ne-22.4 litres. Lo "volumu ye-molar" uvavanyo olulula: ukuba i-mol yakho enye ekwimo ye-mole ecaleni kwezi zimo ihlala ingaphantsi kwe-22.4 L, khangela kwakhona iiyunithi.
Iwuphi umgaqo wegesi ofanelekileyo owela phantsi?
Ichanekile kakhulu kuxinzelelo oluphakathi kunye neqondo lobushushu phezulu kakhulu kwinqanaba lokubila, kodwa ikhula ingachanekanga kuxinzelelo oluphezulu okanye kufutshane nokutywina, apho ubukhulu bemolekyuli kunye nokutsala kubaluleke kakhulu. I-equations yegesi ebonakalayo njenge-van der Waals iphatha ezo.
Utshintsho lwesilinganisi ngasinye luyichaphazela njani enye?
Kwii-mole ezimiselweyo, uxinzelelo kunye nobukhulu buhambelana ngokuthe ngqo (umthetho kaBoyle), ngelixa ubukhulu kunye nobushushu obupheleleyo buhambelana ngokuthe ngqo (umthetho kaCharles). Ubushushu bebhokisi eqinileyo ekhuselekileyo kwaye uxinzelelo luyanyuka ngokuhambelana nobushushu be-kelvin.
Lithini ixabiso le-R ekufuneka ndilisebenzise?
It depends on units. In SI it is 8.314 J/(mol·K); in litre-atmospheres it is 0.08206 L·atm/(mol·K). This calculator works in SI internally with R = 8.314, so you can enter any units and it reconciles them.
API — sebenzisa le calculator ukusuka kwikhowudi
Nceda le khadi lemali njengendawo esemva ye-JSON ekhululekileyo - akukho qhosha lifunekayo. Thumela amaxabiso endawo ezantsi njengeparameter yombuzo okanye i-JSON. Nantoni na oyenzayo isebenzisa okungagqibekanga okufanayo eli phepha ligqityiwe ngaphambili; iparameter engaziwayo yi 400, ayikho i zero ekhululekileyo. Funda i-API epheleleyo →
Incopho yesiphelo
GET https://calculator.free/api/v1/ideal-gas-law/curl
curl "https://calculator.free/api/v1/ideal-gas-law/?solve=volume&pressure=1&pressure_unit=atm&volume=22.4&volume_unit=l&moles=1&temperature=273.15&temperature_unit=k"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/ideal-gas-law/?" + new URLSearchParams({
"solve": "volume",
"pressure": "1",
"pressure_unit": "atm",
"volume": "22.4",
"volume_unit": "l",
"moles": "1",
"temperature": "273.15",
"temperature_unit": "k"
}));
const data = await r.json();
console.log(data.results);Results are estimates for general guidance only, not financial, medical or tax advice.