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    Barometric formula

    The barometric formula defines atmospheric pressure dependence from altitude.

    p=p0⋅exp(−M⋅g⋅h−h0R⋅T)p=p_{0}\cdot exp\left ( -M\cdot g\cdot \frac{h-h_{0}}{R\cdot T} \right )

    where:

    • p0 - pressure on Earth surface
    • M - molar mass of Earth's air
    • g - gravitational acceleration
    • R - universal Gas constant
    • T - air's absolute temperature

    let's consider:

    p0 = 101325 Pa

    M = .029 kg/mol

    R = 8.3145 J/(mol*K)

    T = 273 K

    barometric formula graph.PNG
    Fig.1 Atmospheric pressure depending on height (meters)