You are designing a process that requires a molten liquid solution of copper (Cu) and silver (Ag). You start with a charge of 1,000 kg of pure Cu and 2,000 kg of pure Ag at 298 K and 1 atm.
You place the materials in a well-insulated, open container and heat them to 1356 K so that they form a liquid mixture. The heater provides 114.2 kW of power. The enthalpy of mixing of liquid Ag and liquid Cu is given by:

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Ah mix = -20,600XcaXAg mol