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OpenStudy (anonymous):
An insulated bathroom water heater holds 100. L of water at 55.°C. After an hour, the temperature of the water drops by 0.176°C. The temperature of the air in the house is 20.°C. The specific heat capacity of water is 4.18 J·K-1·mL-1. I'm asked to find the entropy change of the system, surroundings, and universe. I just need to know an equation that would work...
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