Two heat engines receive heat from a source at temperature of 550◦C. Heat engine "A" receives 200 kJ of heat and rejects the waste heat to a sink at 180◦C. Heat engine "B" receives 180 kJ of heat and rejects the waste heat to a sink at 120◦C.(a) Caclualte the generated entropy, Sgen, in both processes.(b) Based on your answer in part (a), identify the heat transfer that is more irreversible

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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.