use steam tables in English units or EES. a. Saturated steam at 445 ⁰F is throttled adiabatically to 110 psia in a steady flow process. Calculate the lost work of the process if the surroundings are at temperature 70 ⁰F. [Answer: 68.9 Btu/lb.] b. Saturated steam 445 ⁰F is expanded reversibly and adiabatically in a turbine to 110 psia. Calculate the work of the turbine (= ideal work). [Note that some steam must condense. Answer: 811 Btu/lb.] c. What fraction of steam condensed in part b.? [Answer: 10%.]

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Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.