Q1// A closed rigid system has a volume of 80 litres contains steam at 2 bar and dryness fraction of 0.85. Calculate the quantity of heat which must be removed from the system in order to reduce the pressure to 1.0 bar. Also determine the change in enthalpy and entropy per unit mass of the system. Use tables in figure below.

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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.