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Understand: thermodynamics

Problem

A full bottle containing 2 kg of water at 25°C and another bottle containing 1 kg of water at an unknown temperature are placed in an insulated bag. Upon reaching thermal equilibrium, the full bottle’s temperature decreases to 15°C. The specific heat of water is 4.18kJkg°C. Assume the system is thermally isolated.
Which of the following statements is correct?
Choose 1 answer:
Stuck?
Stuck?