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Using the appropriate tables, determine the change in specific entropy between the specified states, in Btu/lb...

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Mechanical Engineering

Using the appropriate tables, determine the change in specificentropy between the specified states, in Btu/lb · °R.

(a) water, p1 = 10 lbf/in.2,saturated vapor; p2 = 500 lbf/in.2,T2 = 700°F.
(b) ammonia, p1 = 140 lbf/in.2,T1 = 160°F; T2 = -10°F,h2 = 100 Btu/lb.
(c) air as an ideal gas, T1 = 80°F,p1 = 1 atm; T2 = 340°F,p = 5 atm.
(d) oxygen as an ideal gas, T1 =T2 = 520°R, p1 = 10 atm,p2 = 9 atm.

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