Consider an alloy containing 30 wt% Sb. If the alloy is held at 400 oC, how much of the alloy is in a liquid solution? Bi-Sb Bismuth-Antimony °C 700 Atomic Percentage Antimony 50 10 20 30 40 60 70 80 90 1200F 630.74 600 100or 500 400 700F (Bi, Sb) 300 500F 27L442 200 Bi 10 30 40 50 60 70 80 90 Sb D.T.H. Weight Percentage Antimony 0% 77% O 23% O 100% 20 101

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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.