As a result of heat transfer to the surroundings during a constant-pressure process, 0.375 kg of steam in a frictionless piston-cylinder assembly experiences a decrease in entropy of 2.75 kJ/kgK. The initial temperature and pressure of the steam are 700 C and 1.6 MPa, respectively, and the process is internally reversible. Calculate the work and the heat transfer for this process and the total entropy change (Tsur. = 27 C).

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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.