Physical Chemistry4

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A 3 mg sample of an unknown ideal gas is subjected to an adiabatic and
mechanically reversible expansion from an initial pressure of 2 atmospheres to a final pressure
of 300 torr. Given that gamma
for the gas is 1.532 and that the temperature drop achieved in the
expansion is 231 K, calculate both the initial and final temperatures. Go on to determine
delta H and the molecular weight of the gaseous species if the energy lost in the expansion is
0.126 J. empirical relation

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