What Would Be the Appropriate Equilibrium Temperature of a System

question 52

Multiple Choice

What would be the appropriate equilibrium temperature of a system obtained by adding 25.0 g of ice at 0 °C to 250.0 mL of "hot" (80 °C) coffee,assuming that the heat capacity and density of the coffee are the same as for pure water (4.18 J g^-1 °C^-1 and 0.997 g mL^-1) ,and also assuming negligible heat transfer with the surroundings? [For water,Δ_fusH = 6.02 kJ/mol.]

• A)33 °C
• B)40 °C
• C)65 °C
• D)73 °C
• E)79 °C

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