理想气体法计算器
依您对压力、体积和温度单位的选择,为任何变量解决PV = nRT。
输入结果时更新 。
关于此计算器
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.
经常问到的问题
什么是理想的天然气法?
PV = nRT 链接压力、体积、摩尔和理想气体的温度,通过恒定R = 8.314 J/(mol/K) 。为任何单个变量重新排列,以解析。
正确的单位是什么?
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.
为什么温度必须在海尔文?
PV = nRT 使用绝对温度,0K为绝对零。 摄氏度和法赫伦海热为任意零,因此在°C中插入直接给出错误答案。 添加273. 15至°C 以获得Kelvin ——计算器自动这样做。
受威胁人民协会和摩尔体积是什么?
标准温度和压力一般为0°C和1 atm, 理想气体的一毫尔大约占用22.4升。 “ 摩尔体积”是一种手动检查: 如果你在条件附近发现一个毫尔离22.4升远, 请重新检查单位 。
理想的天然气法何时崩溃?
温度和压力的温和度都非常精确,远高于沸点,但高压或接近浓缩时,分子量和吸引力都很重要,因此增长不准确。 范德瓦尔等真实气体方程式处理这些。
改变一个变量会如何影响其他变量?
在固定的摩尔人身上,压力和体积是反比的(波伊尔法 ), 而体积和绝对温度是直接相关的(查尔斯法 ) 。 热固固态容器和压力上升与海藻温度成比例。
我该用什么R值?
它取决于单位。在SI中,8,314 J/(摩尔-K);在升大气中为0.08206 L-atm/(摩尔-K),该计算器在SI内部工作,R=8.314,以便您可以进入任何单位,并调和它们。
API - 使用代码中的计算器
将此计算器称为自由 JSON 端点 。 不需要按键 。 将字段值发送到下面作为查询参数或 JSON 。 任何您省略的, 都会使用相同的默认值, 此页面预填的默认值是预填的; 未知参数是 400, 而不是静音零 。 读取 API 全部文件 →
终点
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);成果仅是一般指导的估计数,而不是财务、医疗或税务咨询。