Question

A gas, assumed ideal, flows isentropically from point 1,
where the velocity is negligible, the pressure is 200 kPa,
and the temperature is 300°C, to point 2, where the pressure
is 40 kPa. What is the Mach number Ma2 if the gas is
(a) air, (b) argon, or (c) CH4? (d ) Can you tell, without
calculating, which gas will be the coldest at point 2?

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Fluid Mechanics

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