Ideal Gas Law: The four state variables of an ideal gas. This free calculator solves for Pressure, volume, moles, temperature and shows every step.
The ideal gas law ties together the four state variables of a gas. Its key practical traps are units: temperature must be absolute (the calculator converts °C/°F to kelvin for you), and pressure/volume units must match the gas constant.
1 mol at 0 °C (273.15 K) and 1 atm (101,325 Pa). V = nRT/P = (1·8.314·273.15)/101325 = 0.0224 m³ = 22.4 L — the classic molar volume.
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Ideal Gas Law uses the formula P·V = n·R·T. The four state variables of an ideal gas.
Choose which variable to solve for, enter the values you know (in any supported unit), and the calculator substitutes them into P·V = n·R·T and shows every step of the working. It can solve for Pressure, volume, moles, temperature.
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