(1) The densities and specific heat of coffee and milk are not so very different

Question

(1) The densities and specific heat of coffee and milk are not so very different from those of water.

Denisty of coffee = density of milk = density of water = 1.000 g/cm^3

Heat Capacity of coffee = Heat Capacity of milk = Heat Capacity Water = 4.186 J/g * c

Suppose that one's favorite mug is known to hold 300 + or - 5 mL of fluid. Furtehr suppose that 250 + or - mL of freshly-brewed, piping hot, 85 + or - 1 C, coffee is poured into the mug and topped-up with 50 + or - 25 mL of milk, from the fridge at 5 + or - 1 C. Predict the expected range of temperatures for the beverage just after the milk is added.

Explanation / Answer

maximum temp=(275*86+25*6)/300=79.33 C

minimum temp=(225*84+75*4)/300=64 C

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