Q. 120 grams of boiling water (temperature 100° C, heat capacity 4.2 J/gram/K) are poured into an aluminum pan whose mass is 900 grams and initial temperature 22° C (the heat capacity of aluminum is 0.9 J/gram/K).

(a) After a short time, what is the temperature of the water?

(b) Next you place the pan on a hot electric stove. While the stove is heating the pan, you use a beater to stir the water, doing 25690 J of work, and the temperature of the water and pan increases to 78.7° C. How much energy transfer due to a temperature difference was there from the stove into the system consisting of the water plus the pan?