A 0.5 kg of ice(-4°) C is used to cool a bag of shrimp in an insulated cooler after hours all ice melts into water and the final temp of the shrimp and water is 2°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.