A pressure relief valve is installed in a rigid 25-L steam cooker to release vapor and maintain pressure after the pressure within the cooker exceeds 175 kPa. This cooker is first filled with water at 200 kPa and a quality of 10%. Heat is now applied until the quality within the cooker reaches 40%. Calculate the smallest entropy change of the thermal energy reservoir that is supplying this heat.

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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.