216.
Problem 23.39 (RHK)
Air at and 1.00 atm pressure has a density of , and the speed of sound is at that temperature. We have to compute (a) the value of for air and (b) the effective molar mass of air.
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and
(a)
Speed of sound,, is related to pressure, density and for the medium as
Substituting the data, we find
(b)
For determining the effective molar mass of air, we use the ideal gas equation of state
and 1.00 atm pressure
has a density of
,
and the speed of sound is
at that temperature. We have to compute (a)
the value of
for air and (b) the
effective molar mass of air.
,
is related to pressure, density and
