12 m3 of moist air at 65% R.H., 32°C, and 100 kPa is compressed to 75% RH in a constant temperature Determine the final (a) volume (b) pressure (c) the mass of water vapor in air at the end of the process. (a) the work needed to compress the moist air. (e) The change of entropy during the process.

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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.