98.5 ml of milk at 21.0oC are added to 437.0 ml of coffee at 88.9oC ...?

Question

98.5 ml of milk at 21.0oC are added to 437.0 ml of coffee at 88.9oC . What is the final centigrade temperature of this liquid mixture when thermal equilibrium is reached ?


Assume coffee has the same properties as pure water.


The average density of milk is 1032 kg/m3


The specific heat of milk is 1.97 J/g-oC

Answer 1

Use the equation q = m x C x (Tf - Ti).

You are given the mass and specific heat and initial temp. of each component. (Water / coffee density is 1000 kg /m3 and the sp. heat is 4.184 J/g -oC)

The heat lost by the coffee is gained by the milk. They both have the same final temperature. Set the equations equal to each other and solve for Tf.

Answer 2

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