Find the final equilibrium temperature when 20.0 g of milk at 15.0°C is added to 155.0 g of coffee at 89.0°C.(Assume the specific heats of coffee and milk are the same as water and neglect the heat capacity of the container. )c_water = 1.00 cal/g⋅°C = 4 186 J/kg⋅°C A)80.5°C B)100°C C)104°C D)77.1°C E)78.9°C

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Quizplus · Accepted Answer

The correct answer is A because the final temperature will be between the initial temperatures of the coffee and the milk. The specific heat of water is 1.00 cal/g⋅°C, so the heat lost by the coffee will be equal to the heat gained by the milk. The final temperature will be the average of the two initial temperatures, which is 80.5°C.

Find the Final Equilibrium Temperature When 20