Question: 14. [15 marks] Please answer to three significant figures. A 250 mL cup of coffee is too cold to drink at 20 'C, so it

14. [15 marks] Please answer to three significant figures. A 250 mL cup of coffee is too cold to drink at 20 'C, so it is poured into a 120 g stainless steel container that had been previously heated up to 90 .C. What is the final temperature of coffee? Assume that the cup and coffee are thermally insulated from its surroundings. The specific heat capacities of the stainless steel cup and coffee are Coup = 502 J/kg . C and Ccoffee = 4186 J/kg . C respectively. The density of water/coffee is p = 1000kg/m. (Conversion factor: 1 m' = 1000L)

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