A thin membrane divides a rigid vessel into two equal volumes. The left side initially contains 1.5 kg water at 400 kPa and 50°C while the right side is evacuated. The membrane is now ruptured, and the water fills the entire vessel. The final pressure in the vessel is 275 kPa. Determine the change in entropy of water.

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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.