What Would Be the Appropriate Equilibrium Temperature of a System

question 48

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, ΔHfusion = 6.02 kJ/mol.]

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

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