Engineering
Using the appropriate tables, determine the change in specific entropy between the specified states, in Btu/lbPR. (a) water, P1 10 lbf/in.2, saturated vapor; P2 500 Ibf/in.2, T2 1000F (b) ammonia, P1 140 bf/in.2, T1 = 160F; T2= -10F, h2 = 590 Btu/lb. (c) air as an ideal gas, T1 = 80F, P1 = 1 atm: T2 = 340F, p = 5 atm. (d) oxygen as an ideal gas, T1=T2=520R, P1=10 atm, P2 = 5 atm