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Frito, wearing an enigmatic smile, seals 20g of steam at 120°C, 100g of ice at -20°C,...

Frito, wearing an enigmatic smile, seals 20g of steam at 120°C, 100g of ice at -20°C, and 500g of liquid water at 50°C inside an insulated box. Eventually, equilibrium is reached. What is the temperature in the box at that point?

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