A 30.0-g ice cube floats in 212 g of water in a 100-g copper cup; all are at a t

Question

A 30.0-g ice cube floats in 212 g of water in a 100-g copper cup; all are at a temperature of 0

A 30.0-g ice cube floats in 212 g of water in a 100-g copper cup; all are at a temperature of 0°C. A piece of lead at 99.0°C is dropped into the cup, and the final equilibrium temperature is 12.0°C. What is the mass of the lead? (The heat of fusion and specific heat of water are 3.33 x 105 J/kg and 4,186 J/kg · °C, respectively. The specific heat of lead and copper are 128 J/kg · °C and 387 J/kg · °C, respectively.)

Explanation / Answer

You'll cool the lead and heat everything else. All components will wind up at the same final temperature, 12

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