Question

A piece of aluminum (specific heat 0.910kJ/kg ⁰C) of mass 161g at 74 ⁰C is dropped into a Styrofoam cup filled with 152ml water at 20 ⁰C. What are the final temperatures of the water and the aluminum? Please use C instead of ⁰C in your answer.

Hint 1: because the cup is well-insulated, you can assume that all the heat leaving the aluminum as it cools goes to heating the water.

Hint 2: How are the final temperature of the aluminum related to the final temperature of the water?

(Use 4.19kJ/kg^oC for the specific heat of water.)

Answer 1

The solution is done in the above attached images