Steam at a massflow rate of 10 kg/s at 5 MPa and 600 °C enters an insulated turbine operating at steady state and exits as saturated vapor (x = 1) at 56 kPa. Kinetic and potential energy effects are negligible. [7.5] a) Calculate the work output of the turbine. [5] b) Does the expansion process inside this particular turbine occur in a reversible or irreversible way ? Please briefly explain your reasoning. [5] d) Sketch the process path inside the turbine in a T-S diagram. Include the two-phase region in your diagram as well. [7.5] c) Calculate the isentropic efficiency of the turbine show linear interpolation

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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.