Steam at 35 bar and 600 K enters a throttling valve that reduces the steam pressure to
7 bar. Assuming there is no heat loss from the valve, what is the exit temperature of the steam and its change in entropy?
b. If air (assumed to be an ideal gas with C P = 29.3J / mol.K ) entered the valve at 35 bar and 600 K and left at 7 bar, what would be its exit temperature andentropy change?
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