An underground cavern will be used to store energy of compressed air. the cavern has a volume of 150,000 ft³ determine the maximum availab energy from compression of air from 15 to 500 psia at 540 R at isotherm conditions with a loss of 100,000 Btu.

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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.