500 grams of water is used to quench iron steel. 50 grams of iron steel at 300°C is dipped into the water at 25°C. What is the final temperature of the iron and water system? Neglect the evaporation of water. Specific heat of water is constant at 1 cal/g·°C Specific heat of iron is constant at 0.12 cal/g·°C

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