Gas Constant - U.S. Standard Atmosphere

U.S. Standard Atmosphere

The U.S. Standard Atmosphere, 1976 (USSA1976) defines the gas constant R* as:

The USSA1976 does recognize, however, that this value is not consistent with the cited values for the Avogadro constant and the Boltzmann constant. This disparity is not a significant departure from accuracy, and USSA1976 uses this value of R* for all the calculations of the standard atmosphere. When using the ISO value of R, the calculated pressure increases by only 0.62 pascal at 11 kilometers (the equivalent of a difference of only 0.174 meter or 6.8 inches) and an increase of 0.292 Pa at 20 km (the equivalent of a difference of only 0.338 m or 13.2 in).

Read more about this topic:  Gas Constant

Famous quotes containing the words standard and/or atmosphere:

    When Freedom, from her mountain height,
    Unfurled her standard to the air,
    She tore the azure robe of night,
    And set the stars of glory there;
    Joseph Rodman Drake (1795–1820)

    The life of our city is rich in poetic and marvelous subjects. We are enveloped and steeped as though in an atmosphere of the marvelous; but we do not notice it.
    Charles Baudelaire (1821–1867)