A 3 Kg lead ball is dropped into a 3 L insulated pail of water initially at 20.0 degrees C. If the final temperature of the water-lead combination is 25 degress C, what was the initial temperature of the lead ball?

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  1. the sum of the heats gained is zero.

    heat gained by water+heat gained by Pb =0
    solve for Ti lead.

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  2. 69 degrees

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