Problem 2-1 Steam expands in a turbine steadily at a rate of 10 kg s, entering at 6 MPa, 500°C, and 70 m/s and leaving at 6 kPa, 120°C, and 120 m/s. Calculate: (a) the power output of the turbine, and (b) the rate of entropy production. Assume the surroundings to be at 25°C and 100 kPa.

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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.