Specific Heat Problem and boiling water

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The discussion revolves around a specific heat problem involving boiling water and an aluminum pan. The user sets up the equation Q=mcΔT to calculate the final temperature after mixing 140 grams of boiling water at 100°C with an aluminum pan at 24°C. The calculations lead to a final temperature of approximately 52.319°C. Clarification is provided that this value represents the final temperature, not the temperature change. The conversation confirms the accuracy of the calculations and understanding of the concept.
clutch12
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Homework Statement


140 grams of boiling water (temperature 100° C, heat capacity 4.2 J/gram/K) are poured into an aluminum pan whose mass is 1100 grams and initial temperature 24° C (the heat capacity of aluminum is 0.9 J/gram/K).
After a short time, what is the temperature of the water?


Homework Equations


Q=mc delta t


The Attempt at a Solution



140g(4.2J/K/gram)(T-100) = 1100g(0.9 J/K/gram)(24-T)
588T-58800 = 23760 - 990 T
588T + 990 T = 23760 + 58800
1578 T = 82560
T= 52.319

Am I doing this right?
 
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Looks good to me, clutch.
 
Alright and when I am determining the temperature am i subtracting 100-52.319 or no?
 
No, 52.319 is the final answer. 100-52.319 would be the change in temperature of the water.
 
oh ok thanks for clearing that up
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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