0.5 kg of water at 20 degrees C is added to a container of 1 kg of water at 60 degrees C.
The water is stirred to even out the temperature. What is the final
temperature of the water?
Let be the final temperature of the water, , the temperature and mass of the water that is added, and the temperature and mass of the water in the container.
Equation of energy balance is , from where
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