EARTHSS 23 Lecture 3: ESS23 Lecture 3 and 4
10 Mar 2017
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Document Summary
Atmospheric pressure (p) = density ( ) x height (h) x gravitational acceleration (g) 1 atmosphere (atm) = 1013. 25 hectopascal (hpa, also called millibar or mb) = 760 torr (named after torricelli, also called millimeters of mercury or mmhg) Exponential decay of atmospheric pressure as a function of altitude pressure = sea level. Stratosphere: temperature is higher in the higher region (stable) Troposphere: temperature is higher in the lower region (unstable in general: warmer air is less dense, example is hot air balloon. Equation of state: describes the relationship among pressure (p), volume (v), and temperature (t) Boyle"s law (p = (1/v)), charles" law (v = t), avogadro"s law (v = n) For a given t and p, the number of molecules in a volume is the same for any gas. A = 6. 02252 * 1023 molecules/mole, 1 mole = 22. 4 l (at 1 atm and 0 degrees celcius)
