Two ways to change the energy of a system; First law of thermodynamics; Specific heat
You add 25 g of milk at 10 °C to 200 g of coffee (essentially water) at 70 °C. The coffee is in a Styrofoam cup. If the specific heat of milk is 3800 J/kg . °C, by how much will the coffee temperature decrease when the milk is added? Indicate any assumptions you made.
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