A cup contains 180 g of black coffee at a temperature of 82 °C. 68 g of milk at a temperature of 2.7°C is added to the coffee. An ideal temperature range for drinking coffee is said to be 50°C to 60°C.
Deduce whether the coffee will be within the ideal temperature range when the milk is added.
initial temperature of milk = 2.7°C
specific heat capacity of black coffee = 4.2 × 103 J kg−1 K−1
specific heat capacity of milk = 3.9 × 103 J kg−1 K−1
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