1 kg of saturated water vapour at 100oC is condensed into 100% saturated liquid water at 100oC in a constant (atmospheric) pressure heat exchanger that discharges heat to the surroundings at 25oC. Determine the total change of entropy for the process (i.e. Change of entropy of water substance + change of entropy of the surroundings). Enter value in kJ/K (to within 1%, please) How much work could be extracted from the same process if we replace the heat exchanger with an ideal Carnot cycle which is fully reversible (with the same surrounding temperature)? Enter absolute value in kJ. 1% range accepted

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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.